Period Underwear, ranked by PFAS safety

JAMA Organic

LOLA Organic Cotton Period Underwear

Organic cotton with moisture-wicking gusset

A

B

PFASAll

Lower PFAS concern, organic cotton base with no waterproof claims, but brand doesn't explicitly address PFAS.

✓Verified PFAS-free by a third party

JAMA Organic

Organyc Certified Organic Cotton Disposable Period Underwear for Sensitive Skin

certified organic cotton with absorbent core

A

A

PFASAll

Lower concern, organic cotton base suggests minimal PFAS risk, but no explicit PFAS statement limits confidence.

✓Verified PFAS-free by a third party

Ruby Love

Women's Hipster Period Underwear

organic cotton with waterproof coating

A

B

PFASAll

Lower concern, PFAS-free verified; buy with confidence.

✓Lab test found no PFAS

Anigan

hannahpad USA Organic Brief Light Period Underwear Comfort

organic cotton, gusseted fabric with undisclosed moisture-wicking coating

A

B

PFASAll

Lower PFAS concern given organic cotton base, but moisture barrier coating source remains undisclosed.

✓Verified PFAS-free by a third party

Lunapads

Lunam Full Brief

organic cotton, waterproof layer (unspecified polymer)

A

A

PFASAll

Lower-concern option; brand claims PFAS-free with third-party backing, though waterproof layer polymer not fully disclosed.

✓Verified PFAS-free by a third party

Lola

Organic Disposable Postpartum Underwear

organic cotton with elastane/spandex

A

A

PFASAll

Lower-concern choice; MADE SAFE certification reduces risk, but no explicit PFAS testing disclosure.

✓Verified PFAS-free by a third party

Anigan

Organic Cotton and Hemp fiber Leakproof Period Undies – no PFA added - Rif Care Medium $29 / 4 packs

organic cotton and hemp fiber with leak-resistant layer (unspecified)

A

B

PFASAll

Lower-concern choice with explicit PFAS claim, but lack of third-party verification leaves some uncertainty about leak barrier.

⚠Risky category by default

Aisle

Super Hipster

Organic cotton, wood pulp fiber

C

F

PFASAll

Lower PFAS concern for period-care product, but brand transparency is absent.

⚠Risky category by default

Aisle

Boost Boxer

Absorbent core (likely cellulose, SAP); fabric blend (cotton/polyester typical)

C

F

PFASAll

Lower PFAS concern; standard period-care material with no known fluorochemical finish.

⚠Risky category by default

Bambody

Women's High Waist Bamboo Period Underwear

bamboo viscose fabric, synthetic gusset (likely polyester/nylon)

C

F

PFASAll

Lower PFAS concern, bamboo fabric carries minimal inherent risk, but gusset material and any coatings remain unconfirmed.

⚠Risky category by default

Bambody

2 Bambody Absorbent Panty: Period Panty: Maternity & Postpartum Panty

bamboo viscose blend, absorbent gusset (composition unspecified)

C

F

PFASAll

Lower concern; natural fiber base unlikely to contain legacy PFAS, but no brand transparency on gusset treatment.

⚠Risky category by default

Bambody

Women's Absorbent Combortable Boxer

Organic bamboo viscose blend (absorptive textile)

C

D

PFASAll

Lower PFAS concern, absorbent period-care textiles rarely require water-repellent coating finishes, but verify materials with brand.

⚠Risky category by default

Bambody

Women's Absorbent Breathable Hipster Underwear 3-Pack

bamboo viscose/cotton blend with absorbent gusset

C

F

PFASAll

Lower-concern choice; no known PFAS drivers in basic absorbent underwear, but brand offers no transparency.

⚠Risky category by default

Bambody

Women's Bamboo Rayon Absorbent Period Panties

Bamboo rayon absorbent core with gusseted design; no waterproof barrier layer specified

C

F

PFASAll

Lower concern, period panties with absorbent rayon core unlikely to require PFAS, but ask brand about absorbency treatment.

⚠Risky category by default

Dear Kate

Women's Hazel Hipster Mini Panty

Cotton/nylon blend (standard period-care undergarment)

C

F

PFASAll

Lower concern; standard cotton-blend period underwear has minimal PFAS risk unless undisclosed water-resistant coating applied.

⚠Risky category by default

Dear Kate

Hazel Hipster Period Panties

Cotton blend gusset, polyester/nylon body

C

F

PFASAll

Lower PFAS concern; typical period-panty materials carry minimal risk, but brand offers no transparency.

⚠Risky category by default

Dear Kate

Women's FSA-Eligible Dear Kate Period Underwear Ada Brief Full

Nylon/spandex blend with gusseted crotch panel

C

F

PFASAll

Lower concern; period underwear lacks typical PFAS use cases, but brand is silent on materials.

⚠Risky category by default

Flux Underwear

FLUX Lace Waist Period Panties - Light | Meluna USA, XX-Small (US 2)

Cotton blend (organic cotton/elastane base); absorbent gusset likely polyester or cotton terry

C

F

PFASAll

Lower concern for PFAS; no evidence of water-resistant coatings typical of period-care products.

⚠Risky category by default

JAMA Organic

Rael Organic Cotton Disposable Period Underwear

Organic cotton with unspecified absorbent layers

C

F

PFASAll

Lower-concern choice; organic cotton base mitigates risk, but lack of transparency on absorbent layers leaves small uncertainty.

⚠Risky category by default

JAMA Organic

The Period Company The Bikini Period. in Sporty Stretch For Heavy Flows

Organic cotton blend with stretch fibers (likely elastane/spandex)

C

F

PFASAll

Lower PFAS concern; organic cotton period products typically avoid water-repellent coatings that carry PFAS risk.

⚠Risky category by default

JAMA Organic

The High Waisted Period. in Organic Cotton For Heavy Flows

Organic cotton (absorbent core)

C

F

PFASAll

Lower PFAS concern, organic cotton period underwear rarely requires water/stain treatments, but no brand transparency confirmed.

⚠Risky category by default

JAMA Organic

Shorty Jim Jams

Organic cotton (inferred from brand positioning)

C

F

PFASAll

Lower concern for PFAS, but brand transparency on materials and supply chain is limited.

⚠Risky category by default

JAMA Organic

Lyra High Waist Organic Cotton Menstrual Underwear

organic cotton, likely no water-resistant coating

C

F

PFASAll

Lower-concern choice; organic cotton menstrual underwear unlikely to contain PFAS, but brand offers no explicit commitment.

⚠Risky category by default

Proof

The High Waisted Period. in Organic Cotton For Heavy Flows

Organic cotton (primary); absorbent core material unspecified

C

F

PFASAll

Lower PFAS concern for core material, but lack of transparency on absorbent layers leaves some uncertainty.

⚠Risky category by default

Ruby Love

Period Loungewear Sleep Pant

Cotton/cotton-blend stretch fabric (no documented water-resistant or stain-resistant treatment)

C

F

PFASAll

Lower PFAS concern, basic period loungewear with no treated finishes reported, but brand offers no transparency.

⚠Risky category by default

Snifty

PERIOD Thong Period Underwear for Light Flows

absorbent fabric blend (likely cotton/synthetic), no reported water-resistant coating

C

F

PFASAll

Lower PFAS concern, fabric-only period underwear with no waterproofing layer typically avoids fluorochemicals, but brand offers no transparency.

⚠Risky category by default

Snifty

Hanes Women's 3-Pack Light Protection Thongs

Cotton and elastane (spandex) blend

C

F

PFASAll

Lower PFAS concern for basic cotton thongs; no special coatings typical in this category.

⚠Risky category by default

Snifty

Saalt Leakproof Cotton Sleep Short Super

cotton blend (primary); leakproof mechanism unspecified

C

F

PFASAll

Lower-concern option, but leakproof tech details are murky, contact Snifty for specifics.

⚠Risky category by default

Spectra

3-in-1 Spectrum Boxers

absorbent core/fabric blend (standard period-care textiles)

C

F

PFASAll

Lower-concern choice, period boxers rarely require PFAS treatments, but Spectra offers no transparency.

⚠Risky category by default

Spectra

The Period Company The High Waisted Period. in Cotton For Medium Flows Women's

cotton (absorbent core and outer layer)

C

F

PFASAll

Lower concern; conventional cotton menstrual briefs rarely contain intentional PFAS, but brand transparency is absent.

⚠Risky category by default

Spectra

Essential Hipster Denim / XXS

Cotton denim fabric (period-care absorbent core likely cotton/rayon)

C

F

PFASAll

Lower concern, conventional cotton denim rarely requires PFAS treatment, but brand silence on materials leaves room for doubt.

⚠Risky category by default

Spectra

PINK Women's Period Boyshort Panties

Cotton blend (primarily cotton with elastane)

C

F

PFASAll

Lower PFAS concern; standard period underwear with no known chemical treatments, but brand offers no transparency.

⚠Risky category by default

Tomi

The Period Company The Bikini Period. in Sporty Stretch For Heavy Flows

Fabric blend (likely cotton/synthetic mix); elastic components

C

F

PFASAll

Lower-concern period care product; no known PFAS-prone features, but brand provides no transparency.

⚠Risky category by default

Tomi

TomboyX Women's First Line Stretch Cotton Period 9-Inch Boxer Briefs

Stretch cotton blend (primary fiber)

C

F

PFASAll

Lower PFAS concern, basic cotton-blend intimate apparel with no water-repellent coating finish typical of this category.

⚠Risky category by default

Tomi

The High Waisted Period Microfiber For Medium Flows

microfiber (synthetic polyester blend)

C

F

PFASAll

Lower concern, but brand transparency on materials is absent.

⚠Risky category by default

Tomi

tomboyx First Line Stretch Cotton Period 4.5-Inch Trunks

stretch cotton blend (no Teflon-family coating or water-resistant coating disclosed)

C

F

PFASAll

Lower PFAS concern, plain cotton/elastane blend with no water-resistance coating flagged.

⚠Risky category by default

Tomi

TomboyX First Line Period Boy Shorts Underwear

Cotton blend; absorbent core materials (unspecified)

C

F

PFASAll

Lower PFAS concern; period-care textiles rarely use PFAS, but brand transparency is minimal.

⚠Risky category by default

Tomi

The Thong Period. in Sporty Stretch For Light Flows

Fabric blend (cotton/synthetic), absorbent core

C

F

PFASAll

Lower concern; no known PFAS risk, but brand transparency is absent.

⚠Risky category by default

Wearfreely

The High Waisted Period Microfiber For Medium Flows

microfiber synthetic blend

C

F

PFASAll

Lower concern for PFAS, but brand transparency is minimal, verify materials on purchase.

⚠Risky category by default

Wearfreely

The Period Company The High Waisted Period. in Cotton For Medium Flows Women's

cotton

C

F

PFASAll

Lower PFAS concern for a cotton period product; no special coatings typical.

⚠Risky category by default

Wearfreely

Organic Cotton & Bamboo Period Boxer Briefs

Organic cotton & bamboo fabric

C

F

PFASAll

Lower-concern choice; natural fibers don't typically require PFAS treatments, but verify absorbent core.

⚠Risky category by default

Periode

The High Waisted Period Microfiber For Medium Flows

microfiber (polyester/nylon blend)

C

Lower PFAS concern for period underwear; microfiber itself rarely requires PFAS, but brand silence on treatment chemicals is a minor red flag.

⚠Risky category by default

Periode

The Period Company Bikini Heavy Flow Women's

Organic cotton and synthetic elastane blend

C

Lower-concern choice; absorbent period garments typically avoid PFAS, but brand transparency is absent.

⚠Risky category by default

Periode

PINK Women's Period Boyshort Panties

Cotton/elastane blend (typical period-apparel base)

C

Lower PFAS concern, but brand transparency is absent, typical for period-wear category.

⚠Risky category by default

Periode

The High Waisted Period. in Organic Cotton For Heavy Flows

Organic cotton (primary); undisclosed absorbent core materials

C

Lower PFAS concern for organic cotton shell, but core materials remain undisclosed, ask Periode directly.

⚠Risky category by default

Anigan

EvaWear Menstrual Period Panty Tampon Alternative Absorbent Hypoallergenic Black Bikini M Medium

Cotton-blend absorbent fabric (primary); no reported waterproof backing or Teflon-family coating treatment

C

Lower-concern choice for period care; no evidence of PFAS-prone coatings, but no independent verification.

⚠Risky category by default

Anigan

Hannahpad USA High Waist Organic Period Underwear

organic cotton with absorbent gusset layers

C

Lower PFAS concern; organic cotton absorbers, but no public PFAS testing or claim.

⚠Risky category by default

Anigan

The Period Company Bikini Heavy Flow Women's

Absorbent core (likely cotton/cellulose blend) with outer fabric layer

C

Lower concern, period products rarely contain PFAS, but no public disclosure from brand.

⚠Risky category by default

Anigan

PERIOD Women's Extra Coverage High Waisted Organic Cotton Period Underwear for Heavy Flow

organic cotton + absorbent core (likely viscose/cellulose)

C

Lower concern: organic cotton base with no known PFAS-prone coatings, but brand does not explicitly address PFAS.

⚠Risky category by default

Adira

Period Panty - Short

fabric blend (typical: cotton/synthetic); gusset likely includes moisture-wicking/absorbent materials

C

Lower PFAS concern for this category, but verify fabric composition directly with brand.

⚠Risky category by default

Adira

Rael Organic Cotton Disposable Period Underwear

organic cotton with unspecified absorbent core

C

Lower PFAS concern for this product category, but brand provides no transparency on treatment chemicals.

⚠Risky category by default

Cups & Co

The Period Company The Bikini Period. in Sporty Stretch For Heavy Flows

Nylon/spandex blend with gusset absorbent layer

C

Lower-concern product; period underwear rarely uses PFAS, but brand silence on materials limits full assurance.

⚠Risky category by default

Cups & Co

The High Waisted Period Microfiber For Medium Flows

microfiber (synthetic polyester/nylon blend)

C

Lower PFAS concern than apparel, but microfiber opacity warrants caution; brand transparency lacking.

⚠Risky category by default

Cups & Co

The High Waisted Period. in Sporty Stretch For Heavy Flows

Elastic/cotton blend with synthetic stretch (likely spandex or polyurethane)

C

Lower PFAS concern for a period-care textile, but brand transparency is minimal.

⚠Risky category by default

Cups & Co

The High Waisted Period. in Organic Cotton For Heavy Flows

organic cotton

C

Lower-concern choice; organic cotton period underwear has no inherent PFAS trigger, but brand transparency is absent.

⚠Risky category by default

Cups & Co

Cotton Leak-Proof Brief 2-Pack by Comfort Choice in Dark Pack (Size 11)

Cotton with absorbent core (period-care brief)

C

Lower PFAS concern for core material; period-care brief with no water-repellency claims suggests minimal water-repellent coating treatment risk.

⚠Risky category by default

Lunapads

Love Luna Women's Full Brief Period Panty

Organic cotton with absorbent gusset; waterproof backing unspecified

C

Lower PFAS concern, but opacity on waterproof backing material is a gap.

⚠Risky category by default

Lunapads

The High Waisted Period. in Sporty Stretch For Heavy Flows

Organic cotton, nylon elastic, polyester lining

C

Lower concern, natural fiber base, but brand silent on PFAS and waterproofing method.

⚠Risky category by default

Lunapads

Love Luna Women's Reusable Cotton Regular Pad

organic cotton with cotton/linen backing

C

Lower PFAS concern, reusable cotton pads avoid coatings that typically harbor PFAS.

⚠Risky category by default

Alyria

Aerie Real. Period. High Rise Boybrief Underwear

Cotton/synthetic blend, no reported water-resistant or stain-resistant treatment

C

Lower concern, everyday cotton-based underwear with no evidence of PFAS-prone treatments.

⚠Risky category by default

Alyria

The Period Company The High Waisted Period. in Cotton For Medium Flows Women's

Cotton with absorbent gusset

C

Lower PFAS concern; plain cotton period underwear carries minimal flag risk.

⚠Risky category by default

Alyria

Women's Mid-Rised Hipster Panties

Cotton/elastane blend (standard textile)

C

Lower PFAS concern for standard period panties, but Alyria offers no transparency.

⚠Risky category by default

Alyria

The Period Company Bikini Heavy Flow Women's

Absorbent fabric blend (likely cotton, viscose, or polyester)

C

Lower PFAS concern; period-care textiles rarely require water-resistant coatings, but no public disclosure to confirm.

⚠Risky category by default

Southweek

The Period Company Bikini Heavy Flow Women's

Absorbent fabric blend (likely cotton/synthetics); no special coatings disclosed

C

Lower PFAS concern, typical period-care product without waterproofing claims, but manufacturer transparency is absent.

⚠Risky category by default

Southweek

Tampon Tribe Tweenie Bikini Panties

Cotton/synthetic blend panties (typical period-care construction)

C

Lower PFAS concern; standard period panties rarely require PFAS treatments, but brand discloses nothing.

⚠Risky category by default

Lola

Organic Cotton Period Underwear | LOLA XXL

organic cotton with elastane blend

C

Lower-concern choice; organic cotton base mitigates PFAS risk, but Lola makes no public commitment on chemical treatments.

⚠Risky category by default

Lola

The Lola High Waist Period Underwear

Cotton blend gusset with absorbent layers; no specialty coatings disclosed

C

Lower concern product, fabric-only construction with no waterproofing treatment typical of PFAS use.

⚠Risky category by default

Lola

The High Waisted Period Microfiber For Medium Flows

microfiber (polyester blend)

C

Lower PFAS concern for this product category, but Lola's silence on materials deserves scrutiny.

⚠Risky category by default

Lola

The Period Company The High Waisted Period. in Cotton For Medium Flows Women's

Cotton fabric, menstrual pad core

C

Lower PFAS concern for core material; period-care padding rarely uses water-repellent treatments requiring PFAS.

⚠Risky category by default

The Ordbliss

The Period Company The Bikini Period. in Sporty Stretch For Heavy Flows

absorbent fabric blend (likely cotton/synthetic base, no water-resistant coating noted)

C

Lower PFAS concern for a fabric-only period product; no waterproofing claim means no likely PFAS trigger, but verify contents if brand adds water-resistant laye

⚠Risky category by default

The Ordbliss

The High Waisted Period Microfiber For Medium Flows

microfiber (synthetic polyester blend)

C

Lower concern; microfiber itself doesn't inherently require PFAS, but brand silence on materials limits assurance.

⚠Risky category by default

The Ordbliss

The Period Company The High Waisted Period. in Cotton For Medium Flows Women's

cotton absorbent layer

C

Lower-concern period product; cotton construction avoids obvious PFAS vectors, but brand transparency is absent.

⚠Risky category by default

The Ordbliss

Ruby Bliss Women's Period Underwear, Hipster, Black, 3 X

Cotton blend with gusset waterproofing (unspecified)

C

Skip until brand discloses waterproofing method, period underwear often uses PFAS-based water-repellent coating coatings.

⚠Risky category by default

The Ordbliss

PERIOD High Waisted Organic Cotton Bikini Period Underwear for Heavy Flows

organic cotton with absorptive layer (composition unspecified)

C

Lower PFAS concern due to organic cotton base, but lack of transparency on absorbent core materials warrants caution.

⚠Risky category by default

Icon Underwear

The Period Company The Bikini Period. in Sporty Stretch For Heavy Flows

Nylon/elastane blend (Sporty Stretch)

C

Lower PFAS concern; standard period-care textile with no known water-resistant finish.

⚠Risky category by default

Icon Underwear

Small- Icon Speax Undies For Light Leaks- Undies Size S- Thong-beige

Cotton/synthetic blend fabric, likely untreated

C

Lower-concern basic undies, but no transparency on treatment processes.

⚠Risky category by default

Rael

Cotton Cover Period Underwear

cotton fabric with absorbent gusset

C

Lower PFAS concern for a cotton-based period product; no waterproofing function reported.

⚠Risky category by default

Rael

2 Packs Of 5: Rael Organic Cotton Period Underwear Disposable L/xl

organic cotton core; adhesive/binder unspecified

C

Lower concern for period underwear, but ask Rael about adhesive composition to be sure.

⚠Risky category by default

Rael

Unbleached Cotton Cover Overnight Panties

Unbleached organic cotton cover; absorbent core not disclosed

C

Lower concern, but absorbent core composition needs transparency.

⚠Risky category by default

Intimately Free

The Period Company Bikini Heavy Flow Women's

absorbent fabric blend (likely cotton/synthetic rayon or cellulose)

C

Lower-concern category; period-care textiles rarely require PFAS coatings, but no brand disclosure verified.

⚠Risky category by default

Intimately Free

TomboyX First Line Stretch Cotton Period 4.5-Inch Trunks

stretch cotton (primary); no water-resistant or stain-resistant treatment specified

C

Lower concern, plain stretch cotton with no water-resistant treatment, but brand discloses nothing about PFAS.

⚠Risky category by default

Intimately Free

PERIOD Thong Period Underwear for Light Flows

Organic cotton, gusseted absorbent core (likely cotton/rayon blend)

C

Lower concern product; absorbent textiles rarely need PFAS, but brand silence on materials limits full certainty.

⚠Risky category by default

Intimately Free

intimately fp Women's Seamless Lace Bikini Underwear - Pink Fusion L/XL

Nylon/spandex blend lace and seamless fabric

C

Lower PFAS concern, basic intimate apparel with no identified water/stain treatments, but brand offers no transparency.

⚠Risky category by default

Aisle

BOOST Hipster Size PFAS Free leakproof period underwear

absorbent fabric blend with proprietary waterproof barrier

F

Brand makes explicit PFAS-free claim, but no third-party verification, proceed with cautious trust.

⚠Waterproof or stain-proof treatment

Proof

Period Period Underwear

Organic cotton gusset + proprietary waterproof layer

F

Lower-concern option if PFAS-free claim holds, but unverified by third party.

⚠Waterproof or stain-proof treatment

Alyria

Adira Period Panty | Boxer Fit for High Flow | with Support Patch for Pad | Leakproof & Skin Friendly | for School, Travel & Work | Patented | 2 Pack

Cotton/synthetic blend with unspecified waterproof/leakproof coating

F

Skip until brand discloses waterproofing chemistry; leakproof textiles often contain PFAS.

⚠Waterproof or stain-proof treatment

Thinx

Intimates & Sleepwear Thinx for All Women's Period Underwear

Nylon, spandex, cotton blend with waterproof barrier layer

F

Higher PFAS risk due to waterproof coating; brand silent on composition, skip until transparency improves.

⚠Waterproof or stain-proof treatment

Thinx

Make The Switch Set Period Underwear

Cotton/synthetic blend with waterproof coating (composition unspecified)

F

Skip until brand discloses waterproofing chemistry, Thinx has not published PFAS testing or water-repellent coating ingredient specs.

⚠Waterproof or stain-proof treatment

Thinx

Cotton Starter Set Period Underwear

Cotton + proprietary waterproof/absorbent layer coating

F

Moderate concern, waterproof period underwear typically uses PFAS-based coatings, but Thinx discloses nothing.

⚠Waterproof or stain-proof treatment

Knix

SuperPlus Leakproof No- Show High Rise Underwear

Cotton/synthetic blend with proprietary waterproof/leak-resistant coating (unspecified)

F

Skip until Knix discloses coating chemistry or pursues third-party PFAS verification.

⚠Waterproof or stain-proof treatment

Knix

Women's Super Leakproof Dream Boxers

Fabric with waterproof/leak-resistant coating (unspecified chemistry)

F

Skip until Knix discloses coating chemistry or provides third-party testing.

⚠Waterproof or stain-proof treatment

Knix

Medium-Flow Leakproof Period Underwear

Organic cotton/viscose with proprietary waterproof coating (unspecified)

F

Waterproof period underwear with no disclosed coating ingredients, higher uncertainty on PFAS risk.

⚠Waterproof or stain-proof treatment

Saalt

Leakproof Comfort Brief

Organic cotton + polyurethane waterproof layer

F

Skip until brand discloses waterproof coating chemistry or third-party tests.

⚠Waterproof or stain-proof treatment

Saalt

Leakproof Seamless Brief

Nylon/polyester blend with leak-proof coating (composition unspecified)

F

Skip until coating transparency improves, waterproof textiles commonly use PFAS, and Saalt discloses nothing.

⚠Waterproof or stain-proof treatment

Saalt

Leakproof Cotton Brief Saalt

organic cotton with waterproof barrier layer (unspecified)

F

Higher uncertainty, leakproof tech unspecified; request PFAS-free confirmation from brand before buying.

⚠Waterproof or stain-proof treatment

Aisle

Best-Selling Leakproof Period Boxer Brief - Essential Boxer Essential Boxer Eucalyptus / 2X

Cotton blend with unspecified waterproof/leakproof coating

F

Skip until Aisle discloses coating chemistry or pursues third-party verification.

⚠Waterproof or stain-proof treatment

Aisle

Essential High-Rise Period Brief – Leakproof Underwear Essential Brief Black / S

Unspecified waterproof/leak-resistant coating on undisclosed base textile

F

Skip unless Aisle discloses waterproofing chemistry; leakproof period underwear often relies on PFAS-based water-repellent coating treatments.

⚠Waterproof or stain-proof treatment

Aisle

Essential Period Hipster leakproof

textile base with water-resistant/leak-proof coating (type unspecified)

F

Leakproof claim raises coating concerns; no PFAS disclosure means elevated caution.

⚠Waterproof or stain-proof treatment

Aisle

Leakproof Thong Period Underwear

Fabric blend with waterproof/leak-resistant coating (type unspecified)

F

Skip until Aisle discloses waterproof coating chemistry.

⚠Waterproof or stain-proof treatment

Bambody

Absorbent Panties - Period Underwear for Women and Teens

Bamboo viscose blend with undisclosed waterproof/absorbent treatment

F

Skip until brand discloses waterproof treatment chemistry, period underwear's liquid barrier is a PFAS red flag.

⚠Waterproof or stain-proof treatment

Bambody

Boody Bamboo Underwear Period & Leak Proof Full Brief

Bamboo viscose with proprietary leak-proof coating (unspecified)

F

Skip until brand discloses the waterproof coating composition.

⚠Waterproof or stain-proof treatment

Bambody

Absorbent Brief Period Panties Single Pack

bamboo viscose + absorbent layers + unspecified waterproof/leak-resist coating

F

Insufficient transparency; waterproof period panties often use PFAS durable water repellents, Bambody offers no coating disclosure.

⚠Waterproof or stain-proof treatment

Dear Kate

Period Panties – Nellie Brief Full

Fabric with waterproof/moisture-barrier layer (unspecified composition)

F

Skip until brand discloses waterproofing chemistry; menstrual products don't need PFAS.

⚠Waterproof or stain-proof treatment

Dear Kate

Nellie Hipster Period Panties

Cotton/nylon blend with waterproof coating

F

Skip until brand discloses waterproof treatment chemistry, period panties need moisture barriers that often contain PFAS.

⚠Waterproof or stain-proof treatment

Dear Kate

Billie Hipster Period Panties

Cotton/polyester blend with waterproof membrane coating (unspecified water-repellent coating treatment)

F

Skip until brand discloses waterproof coating chemistry or provides third-party testing.

⚠Waterproof or stain-proof treatment

Dear Kate

Ada Hipster Period Panties

Organic cotton + synthetic waterproof layer (water-repellent coating treatment unspecified)

F

Skip until brand discloses waterproof treatment chemistry; period panties need water-repellent coating, likely PFAS risk.

⚠Waterproof or stain-proof treatment

Dear Kate

Nellie Thong Period Panties

Nylon/polyester blend with undisclosed waterproof coating

F

Skip until brand confirms PFAS-free or provides third-party testing.

⚠Waterproof or stain-proof treatment

Flux Underwear

FLUX Women's Seamless Leak-Proof Bikini Period Underwear

Fabric blend with waterproof/leak-proof coating (composition unspecified)

F

Skip until brand discloses waterproof treatment chemistry; period underwear leak-proofing commonly relies on PFAS-based water-repellent coating.

⚠Waterproof or stain-proof treatment

Flux Underwear

MeLuna FLUX Cheeky Light reusable Period Panties

Organic cotton + waterproof membrane layer (unspecified)

F

Lower-concern option, but waterproof coating identity unclear, contact brand for specifics.

⚠Waterproof or stain-proof treatment

Flux Underwear

Knix Light-Flow Leakproof Period Underwear

Cotton/synthetic blend with proprietary waterproof/leakproof coating (unspecified)

F

Skip until the brand discloses coating chemistry, leakproof underwear typically requires water-repellent treatment that may contain PFAS.

⚠Waterproof or stain-proof treatment

Flux Underwear

Culotte menstruelle flux abondant et nuit zéro déchet M (38/40)

Cotton/synthetic blend with waterproof/moisture-barrier layer (unspecified treatment)

F

Skip until Flux discloses waterproof treatment chemistry; period underwear commonly uses PFAS-based water-repellent coating coatings.

⚠Waterproof or stain-proof treatment

Flux Underwear

Flo Period UNDIES

Cotton/synthetic blend with waterproof coating (unspecified)

F

Skip until brand discloses waterproofing chemistry; period underwear absorbent layers often use water-repellent coating coatings that may contain PFAS.

⚠Waterproof or stain-proof treatment

Flux Underwear

Thinx Ultra-Soft Period Underwear Brief-Style Leakproof Underwear for Women

Gusset lining with proprietary moisture-wicking/leak-blocking treatment (unspecified)

F

Skip until Thinx/Flux discloses leak-barrier chemistry, period underwear leakproofing often involves PFAS coatings.

⚠Waterproof or stain-proof treatment

Flux Underwear

HWRETIE Uttoasfay Fluxe Incontinence Underwear,5PC Women's Large Size Solid Color Menstrual Period Underwear

Polyester/cotton blend with undisclosed waterproof coating

F

Skip until brand discloses waterproof treatment chemistry, period underwear often uses PFAS-based water-repellent coating coatings.

⚠Waterproof or stain-proof treatment

JAMA Organic

Period Period Underwear

Organic cotton blend with absorbent gusset, waterproof backing layer (unspecified)

F

Skip until brand discloses waterproof layer composition; period underwear often uses PFAS-based water-repellent coating treatments.

⚠Waterproof or stain-proof treatment

Modibodi

Mid-Rise Period Brief

Gusset fabric with absorbent core; waterproofing method unspecified

F

Skip until brand discloses waterproofing chemistry; period-care products with unspecified water-resistant layers warrant caution.

⚠Waterproof or stain-proof treatment

Modibodi

Basic Full Period Brief

Organic cotton + synthetic waterproof/absorbent core (unspecified coating)

F

Skip until Modibodi discloses waterproofing chemistry or certifies PFAS-free.

⚠Waterproof or stain-proof treatment

Modibodi

Women's High Waist Classic Period Pants

Organic cotton blend with waterproof/leak-resistant membrane coating

F

Skip until Modibodi discloses waterproof coating composition or provides PFAS testing.

⚠Waterproof or stain-proof treatment

Modibodi

Womens Classic Full Brief Light-moderate

Gusset with waterproof barrier layer (likely water-repellent coating-treated textile)

F

Moderate concern: period-care products commonly use water-repellent coating coatings that may contain PFAS, but Modibodi discloses nothing.

⚠Waterproof or stain-proof treatment

Modibodi

Teen Period Hipster Bikini (5 Pack)

Organic cotton, bamboo viscose, nylon blend with waterproof/leak-resistant treatment (unspecified)

F

Uncertain PFAS risk; absorbent-period products typically lower concern, but waterproof coating chemistry is undisclosed.

⚠Waterproof or stain-proof treatment

Modibodi

Men's Moderate-Heavy Absorbency Period Briefs

Gusset fabric with moisture-wicking/waterproof coating (unspecified)

F

Skip until Modibodi discloses coating chemistry or pursues third-party verification.

⚠Waterproof or stain-proof treatment

Modibodi

Mid-Rise Moderate 3 Pack

organic cotton gusset, synthetic waterproof backing (unspecified polymer)

F

Period underwear with undisclosed waterproof layer, lower PFAS risk than legacy water-repellent coating apparel, but coating composition unconfirmed.

⚠Waterproof or stain-proof treatment

Proof

Women's Overnight Absorbency High Rise Period Underwear

Gusseted absorbent fabric with waterproof/stain-resistant layer (unspecified treatment)

F

Period underwear typically uses water/stain-resistant coatings; Proof discloses nothing about PFAS or treatment chemistry, skip unless they publish ingredient de

⚠Waterproof or stain-proof treatment

Proof

Women's Super Heavy Absorbency Period Underwear

Cotton/synthetic blend with waterproof coating layer

F

Skip until brand discloses waterproof treatment chemistry; PFAS risk present but unconfirmed.

⚠Waterproof or stain-proof treatment

Proof

Knix Intimates & Sleepwear Knix Super Leakproof Dream Short

Fabric with unspecified waterproof/leakproof coating

F

Skip until brand discloses coating chemistry, period underwear's waterproof layer is a PFAS red flag.

⚠Waterproof or stain-proof treatment

Proof

. by Always High Rise Washable Period Underwear

Cotton blend with waterproof/moisture-barrier coating (type unspecified)

F

Skip until the brand discloses waterproof coating chemistry, washable period underwear typically uses water-repellent coating treatments that often contain PFAS.

⚠Waterproof or stain-proof treatment

Proof

Boody Bamboo Underwear Period & Leak Proof Full Brief

Bamboo viscose blend with waterproof leak-proof coating (unspecified)

F

Leak-proof underwear requires waterproof coating, brand won't disclose what it is.

⚠Waterproof or stain-proof treatment

Proof

Women's Mid-Waist Leak-Proof Period Underwear

Cotton/polyester blend with waterproof gusset lining (likely water-repellent coating-treated)

F

Skip until Proof discloses waterproofing chemistry, period underwear's leak-proof gusset raises PFAS questions they don't answer.

⚠Waterproof or stain-proof treatment

Ruby Love

Women's Ruby Love Period Underwear

Cotton/synthetic blend with waterproof backing layer

F

Skip until brand discloses waterproof coating composition, PFAS risk unclear.

⚠Waterproof or stain-proof treatment

Ruby Love

Maximum Protection Period Underwear Bundle (10 Pieces)

Cotton/synthetic blend with waterproof backing layer

F

Skip until Ruby Love discloses waterproof treatment chemistry, period underwear's waterproof backing is a common PFAS risk.

⚠Waterproof or stain-proof treatment

Ruby Love

Women's Period Underwear Bikini with Max Protection

Cotton blend with undisclosed waterproof/stain-resistant coating

F

Higher concern due to waterproof coating with no disclosed treatment or independent verification.

⚠Waterproof or stain-proof treatment

Ruby Love

Hipster Women's Period Underwear

Cotton/nylon blend with water-resistant coating (type unspecified)

F

High uncertainty, no PFAS disclosure; waterproof period underwear often uses water-repellent coating coatings that may contain PFAS.

⚠Waterproof or stain-proof treatment

Ruby Love

Teen Period Underwear Hipster

Cotton/synthetic blend with waterproof/moisture-barrier treatment

F

Moderate concern, period underwear requires waterproofing; Ruby Love provides no PFAS transparency.

⚠Waterproof or stain-proof treatment

Ruby Love

Hipster Period Underwear

Organic cotton + waterproof/moisture-wicking layer (composition unspecified)

F

Silent on PFAS; waterproof period underwear inherently raises water-repellent coating concern without transparency.

⚠Waterproof or stain-proof treatment

Snifty

Thinx For All Women's Period Underwear

Cotton/synthetic blend with waterproof coating (type unspecified)

F

Skip until brand discloses waterproofing chemistry; period underwear typically uses water-repellent coating coatings with PFAS risk.

⚠Waterproof or stain-proof treatment

Snifty

Knix Intimates & Sleepwear Knix Super Leakproof Dream Short

Fabric with proprietary waterproof/leakproof coating (unspecified)

F

Skip until Knix discloses coating chemistry or shares lab results.

⚠Waterproof or stain-proof treatment

Snifty

Womens No Boundaries Bikini Super Absorbency Period Underwear

Absorbent textile with waterproof backing layer

F

Skip until brand discloses waterproofing chemistry, absorbent period underwear typically uses PFAS-laden water-repellent coating treatments.

⚠Waterproof or stain-proof treatment

Snifty

Thinx Everyday Comfort Brief Period Underwear

Cotton/synthetic blend with waterproof treatment (composition unspecified)

F

Skip until brand discloses waterproof treatment chemistry, period underwear often uses PFAS-based water-repellent coating coatings.

⚠Waterproof or stain-proof treatment

Snifty

Thinx Intimates & Sleepwear Thinx for All Women's Period Underwear

Cotton/synthetic blend with waterproof coating (unspecified)

F

Skip until brand discloses waterproof treatment chemistry; period underwear requires water resistance that often involves PFAS.

⚠Waterproof or stain-proof treatment

Spectra

PERIOD Boxer Period Underwear for Heavy Flows

Cotton/polyester blend with waterproof backing layer (composition unspecified)

F

Skip until brand discloses waterproofing chemistry or third-party testing.

⚠Waterproof or stain-proof treatment

Spectra

Knix Intimates & Sleepwear Knix Super Leakproof Dream Short

Fabric blend with water-resistant/leakproof coating (presumed water-repellent coating treatment)

F

Skip until brand discloses leakproof coating chemistry, period care worn against skin warrants PFAS clarity.

⚠Waterproof or stain-proof treatment

Spectra

Pink Victoria's Women's Secret Intimates & Sleepwear Period Panty

Cotton blend with liquid-barrier water-repellent coating (unspecified chemistry)

F

Skip until brand discloses water-repellent coating chemistry, period-care products need fluid barriers, a common PFAS use case.

⚠Waterproof or stain-proof treatment

Spectra

PERIOD Adaptive Period Underwear for Heavy Flows

Absorbent fabric core with waterproof backing layer (composition unspecified)

F

Skip until brand discloses waterproof treatment chemistry, period underwear often uses water-repellent coating coatings that may contain PFAS.

⚠Waterproof or stain-proof treatment

Tomi

Thinx Intimates & Sleepwear Thinx for All Women's Period Underwear

Organic cotton + synthetic waterproof layer (composition not disclosed)

F

Skip until brand discloses waterproof treatment chemistry.

⚠Waterproof or stain-proof treatment

Tomi

Modibodi ModiComfort Seamless Full Period Brief

Gusseted absorbent fabric with water-resistant/repellent treatment (composition unspecified by brand)

F

Skip until the brand discloses treatment chemicals or provides third-party testing.

⚠Waterproof or stain-proof treatment

Wearfreely

Always Overnight ZZZ Disposable Period Underwear

Cotton/synthetic blend with waterproof backing layer

F

Skip until brand discloses waterproofing chemistry; period-care absorbers rarely need water-repellent coating, but backing may hide PFAS.

⚠Waterproof or stain-proof treatment

Wearfreely

The High Waisted Period. in Sporty Stretch For Heavy Flows

Cotton-blend stretch fabric with waterproof/moisture-barrier treatment (type unspecified)

F

Skip until brand discloses waterproof treatment chemistry or provides PFAS testing.

⚠Waterproof or stain-proof treatment

Wearfreely

PERIOD Adaptive Period Underwear for Heavy Flows

Moisture-wicking textile blend with waterproof/absorbent backing layer (unspecified)

F

Lower-concern base but opaque waterproofing tech, ask brand before buying if PFAS exposure matters to you.

⚠Waterproof or stain-proof treatment

Wearfreely

The Period Company The Bikini Period. in Sporty Stretch For Heavy Flows

Elastic stretch fabric with unspecified waterproof/leak-resistant treatment

F

Skip until brand discloses waterproof treatment chemistry; period-care products warrant transparency on water-repellent coating coatings.

⚠Waterproof or stain-proof treatment

Wearfreely

Women's Seamless Leakproof Period Underwear

Synthetic blend (nylon/polyester) with unspecified waterproof/leakproof coating

F

Skip until the brand discloses coating chemistry or provides third-party testing.

⚠Waterproof or stain-proof treatment

Periode

The High Waisted Period. in Sporty Stretch For Heavy Flows

Absorbent cotton blend with waterproof backing layer (composition unspecified)

F

Skip until Période discloses waterproof treatment chemistry or provides PFAS testing.

⚠Waterproof or stain-proof treatment

Periode

Thinx Intimates & Sleepwear Thinx for All Women's Period Underwear

Cotton blend with waterproof membrane/coating (unspecified)

F

Skip until waterproof treatment ingredients disclosed, period underwear often uses PFAS-based water-repellent coating finishes.

⚠Waterproof or stain-proof treatment

Periode

Hanes Women's Comfort, Period. Brief Underwear 3-Pack Moderate Leakproof

Cotton/synthetic blend with moderate leakproof treatment

F

Moderate concern, leakproof treatment likely uses PFAS; brand silent on composition.

⚠Waterproof or stain-proof treatment

Periode

The Period Company The Bikini Period. in Sporty Stretch For Heavy Flows

Stretch fabric with moisture-barrier coating (unspecified)

F

Skip until brand discloses waterproofing chemistry, period swimwear often uses water-repellent coating coatings with PFAS history.

⚠Waterproof or stain-proof treatment

Anigan

PERIOD Bikini Period Underwear for Heavy Flows

Absorbent gusset with waterproof backing layer (composition unspecified)

F

Skip until brand discloses waterproof treatment chemistry, period underwear gussets commonly use PFAS-based water-repellent coating coatings.

⚠Waterproof or stain-proof treatment

Anigan

Auden Women's Absorbent Seamless Hipster Period Underwear

Nylon/spandex blend with absorbent lining and water-resistant coating (composition unspecified)

F

Skip until Auden discloses coating chemistry or provides third-party PFAS testing.

⚠Waterproof or stain-proof treatment

Adira

Period Panty

Organic cotton + waterproof/absorbent layers (composition unspecified)

F

Skip until brand discloses waterproofing chemistry, period pants typically use water-repellent coating treatments that may contain PFAS.

⚠Waterproof or stain-proof treatment

Adira

Period Panty - Brief

Absorbent core + waterproof barrier (unspecified coating)

F

Skip until brand discloses waterproof layer composition; period panties often use water-repellent coating treatments that may contain PFAS.

⚠Waterproof or stain-proof treatment

Adira

Incontinence Panty

Fabric with waterproof backing/coating (type unspecified)

F

Skip until transparency improves, waterproof period panties often use PFAS water-repellent coating coatings; Adira discloses nothing.

⚠Waterproof or stain-proof treatment

Adira

The High Waisted Period. in Sporty Stretch For Heavy Flows

Cotton/synthetic blend with waterproof/moisture-resistant coating (unspecified)

F

Skip until brand discloses coating chemistry; period-care waterproofing often relies on PFAS.

⚠Waterproof or stain-proof treatment

Adira

Leakproof Panty

Cotton/synthetic blend with proprietary waterproof coating (unspecified)

F

Skip until coating chemistry is disclosed, waterproof period underwear commonly uses PFAS-based water-repellent coating treatments.

⚠Waterproof or stain-proof treatment

Adira

Auden Women's Absorbent Seamless Hipster Period Underwear

Nylon/spandex blend with proprietary absorbent coating

F

Skip until brand discloses coating chemistry, period underwear's waterproof layer is a common PFAS vector.

⚠Waterproof or stain-proof treatment

Cups & Co

PERIOD Bikini Period Underwear for Medium Flows

Absorbent gusset (likely cotton blend); waterproof backing coating unspecified

F

Skip until brand discloses waterproof coating chemistry, PFAS risk unclear.

⚠Waterproof or stain-proof treatment

Cups & Co

Cabana Cotton Leakproof Bikini

Cotton with proprietary waterproof/leakproof coating

F

Skip until brand discloses coating chemistry or third-party tests leak-protection layer.

⚠Waterproof or stain-proof treatment

Cups & Co

The High Waisted Period. In Sportystretch For Heavy Flows

Sportystretch fabric (likely synthetic blend with waterproof/moisture-barrier treatment, composition unspecified)

F

Skip until the brand discloses materials and treatment chemistry, waterproof sportswear frequently uses PFAS-based water-repellent coating finishes.

⚠Waterproof or stain-proof treatment

Lunapads

Aisle Period Underwear Hipster

Organic cotton + waterproof layer (unspecified)

F

Lower concern, but waterproof layer unspecified, ask the brand directly about PFAS-free water-repellent coating.

⚠Waterproof or stain-proof treatment

Lunapads

Love Luna Women's First Shortie Period Brief Panty

Organic cotton + water-resistant coating (unspecified)

F

Moderate concern: waterproof period underwear often uses PFAS-based water-repellent coating finishes; Lunapads does not disclose coating chemistry.

⚠Waterproof or stain-proof treatment

Lunapads

Super Leakproof Luna Boxer

Organic cotton with water-resistant treatment (type unspecified)

F

Higher PFAS risk due to waterproofing, ask Lunapads for treatment details before buying.

⚠Waterproof or stain-proof treatment

Lunapads

Love Luna Women's Bikini Brief Period Panty

organic cotton with waterproof layer (composition not publicly disclosed)

F

Skip until Lunapads discloses waterproof coating chemistry, period panties often use PFAS-laden barriers.

⚠Waterproof or stain-proof treatment

Alyria

Adira Period Panty - Brief

Cotton/organic cotton with moisture-wicking gusset; waterproof backing likely synthetic polymer

F

Skip until brand confirms waterproof layer PFAS status, period underwear absorbent layers often use fluorinated water-repellent coating treatments.

⚠Waterproof or stain-proof treatment

Alyria

Saalt Leakproof Comfort Brief

Absorbent textiles with waterproof backing layer (composition unspecified)

F

Skip until brand discloses waterproof coating composition; period-care products deserve transparency.

⚠Waterproof or stain-proof treatment

Alyria

Adira Period Panty

Cotton/nylon blend with waterproof backing (composition unspecified)

F

Skip until Alyria discloses waterproofing chemistry, period panties commonly use PFAS-based water-repellent coating.

⚠Waterproof or stain-proof treatment

Southweek

The Period Company The Bikini Period. in Sporty Stretch For Heavy Flows

Absorbent core with stretch fabric layer; waterproofing method undisclosed

F

Skip until waterproof treatment is disclosed, period products targeting heavy flow often use water-repellent coating coatings that may contain PFAS.

⚠Waterproof or stain-proof treatment

Southweek

PERIOD Bikini Period Underwear for Medium Flows

Absorbent core, waterproof backing (unspecified polymer)

F

Skip until transparency improves, waterproof period underwear often uses Teflon-family coating water-repellent coating coatings; Southweek discloses nothing.

⚠Waterproof or stain-proof treatment

Southweek

Knix Heavy Flow Bladder Leak Protection Underwear

Absorbent textile blend with waterproof barrier layer (unspecified coating)

F

Skip until Knix discloses or verifies their moisture-barrier coating composition.

⚠Waterproof or stain-proof treatment

Southweek

Strawberry Weeks Leakproof2.0 Boyshort Period Underwear For

Cotton blend with unspecified waterproof/leakproof coating

F

Skip until brand discloses coating chemistry, leakproof period underwear often uses PFAS-based water-repellent coating treatments.

⚠Waterproof or stain-proof treatment

Southweek

Saalt Leakproof Comfort Brief

Absorbent core fabric blend with moisture-barrier coating (unspecified)

F

Skip until Saalt discloses waterproof treatment chemistry, period-care leakproofing often uses PFAS water-repellent coating.

⚠Waterproof or stain-proof treatment

Southweek

Thinx Inc. Active Mesh Bikini Period Underwear

Nylon/polyester blend with proprietary moisture-wicking/waterproof coating (unspecified)

F

Skip until brand discloses coating chemistry; period underwear's waterproof layer warrants PFAS transparency.

⚠Waterproof or stain-proof treatment

Lola

MeLuna Lola Bikini Period Underwear

Cotton blend with waterproof/moisture-wicking coating

F

Skip unless Lola discloses waterproof coating chemistry, water-repellent coating textiles often use PFAS.

⚠Waterproof or stain-proof treatment

Lola

Lula Bubble Period Underwear

Fabric blend with unspecified waterproof/absorbent coating

F

Skip until brand discloses waterproof treatment chemistry, period underwear often uses PFAS coatings.

⚠Waterproof or stain-proof treatment

The Ordbliss

The Bikini Period Underwear for Medium Flows

Likely absorbent cotton/synthetic blend with waterproof backing coating (unspecified)

F

Skip until Ordbliss discloses waterproof treatment chemistry, PFAS is common in period-underwear water-repellent coating coatings.

⚠Waterproof or stain-proof treatment

The Ordbliss

Auden Women's Absorbent Seamless Hipster Period Underwear

Nylon/polyester blend with unspecified absorbent/waterproof coating

F

Skip until brand discloses waterproofing chemistry, absorbent period underwear often uses fluorinated coatings.

⚠Waterproof or stain-proof treatment

The Ordbliss

Always Overnight ZZZ Disposable Period Underwear

Cotton/synthetic blend with waterproof/moisture-barrier coating (type unspecified)

F

Skip until brand discloses waterproofing chemistry or testing, disposable period underwear typically use water-repellent coating treatments that often contain PFAS.

⚠Waterproof or stain-proof treatment

Icon Underwear

Hanes Women's Comfort, Period. Brief Underwear 3-Pack Moderate Leakproof

Cotton/polyester blend with leakproof treatment (unspecified)

F

Skip until brand discloses leakproof treatment chemistry, likely PFAS risk.

⚠Waterproof or stain-proof treatment

Icon Underwear

Icon Intimates & Sleepwear | Icon Undies Hi-Waist Period Underwear Panties Size Xs Beige (For Moderate Leaks) | Color: Cream/Tan | Size: Xs |

Gusseted cotton blend with waterproof/absorbent lining (likely Teflon-family coating-treated for leak protection)

F

Skip until Icon discloses waterproof coating chemistry, period underwear absorbent linings commonly use PFAS-containing water-repellent coating treatments.

⚠Waterproof or stain-proof treatment

Icon Underwear

Thinx Intimates & Sleepwear Thinx for All Women's Period Underwear

Cotton-blend with waterproof/moisture-wicking treatment (formulation unspecified)

F

Skip until brand discloses waterproof coating chemistry or third-party testing.

⚠Waterproof or stain-proof treatment

Icon Underwear

Icon By Thinx Speax Bikini Women Ladies Underwear Bladder Moderate

Nylon/polyester blend with waterproof/moisture-wicking coating

F

Skip until brand discloses coating chemistry; waterproof underwear for incontinence typically uses PFAS-based treatments.

⚠Waterproof or stain-proof treatment

Icon Underwear

Icon by Thinx Leak Proof Panties Thong

Gusseted fabric with leak-proof coating (composition unspecified)

F

Skip until brand discloses coating chemistry, leak-proof underwear typically uses water-resistant treatments that may contain PFAS.

⚠Waterproof or stain-proof treatment

Icon Underwear

PERIOD Bikini Period Underwear for Medium Flows

Absorbent gusset with waterproof backing layer (likely water-repellent coating-treated synthetic)

F

Skip until brand discloses waterproof treatment chemistry or certifies PFAS-free.

⚠Waterproof or stain-proof treatment

Rael

MeLuna USA Rael Period Bikini Panty

Cotton blend with water-resistant fluid barrier layer

F

Period panties rely on water-repellent coatings, Rael's ingredient silence is concerning; seek PFAS-free confirmation before buying.

⚠Waterproof or stain-proof treatment

Rael

The Period Company The Bikini Period. in Sporty Stretch For Heavy Flows

Nylon/polyester blend with unspecified waterproof/moisture-barrier coating

F

Skip until brand discloses coating chemistry, waterproof period underwear frequently uses PFAS water-repellent coating treatments.

⚠Waterproof or stain-proof treatment

Rael

Reusable Bikini Period Underwear

Cotton/synthetic blend with waterproof coating (unspecified)

F

Skip until Rael discloses coating chemistry or provides third-party PFAS testing.

⚠Waterproof or stain-proof treatment

Intimately Free

Auden Women's Absorbent Seamless Bikini Period Underwear

Nylon/spandex blend with unspecified moisture-wicking/absorbent coating

F

Skip until brand discloses absorbent coating chemistry, period underwear waterproofing often relies on PFAS.

⚠Waterproof or stain-proof treatment

Intimately Free

Womens No Boundaries Bikini Super Absorbency Period Underwear

Fabric with waterproof/absorbent coating (type unspecified)

F

Skip until brand discloses coating chemistry or earns third-party verification.

⚠Waterproof or stain-proof treatment

Intimately Free

Auden Women's Absorbent Seamless Hipster Period Underwear

Absorbent nylon/elastane blend with undisclosed waterproof/absorbent coating

F

Skip until waterproof coating disclosed, absorbent period underwear often uses PFAS-based water barriers.

⚠Waterproof or stain-proof treatment

Intimately Free

No Boundaries Women's High-Rise Brief Period Underwear 2-Pack

Cotton/polyester blend with moisture-wicking/fluid-barrier treatment

F

Period underwear likely contains water-repellent coating treatment (PFAS concern); brand discloses nothing, skip unless certified PFAS-free.

⚠Waterproof or stain-proof treatment