Waterproof Sports & Performance Undergarments, ranked by PFAS safety
70 products graded A to F, safest first. None have earned a C or better yet, so we show the full ranking and the least-concerning options first.
Graded and flagged D and F, we’d swap these
Reebok
Women's Air Tech Performance Brief Panties 6-Pack
nylon, spandex, cotton blend
Lower concern, no known PFAS triggers identified in basic apparel.
⚠Risky category by default
Reebok
Women's Seamless Hipster
nylon/elastane blend, seamless knit
Lower concern. Basic seamless intimate wear, no water-resistant coatings.
⚠Risky category by default
Reebok
Men's Featherweight Performance Boxer Briefs
polyester and elastane blend
Lower PFAS concern; untreated synthetic fibers typical for boxer briefs.
⚠Risky category by default
Reebok
Men's 7 Pack Performance Boxer Briefs, Medium
Cotton blend, elastic waistband
Lower concern; basic boxer briefs with no known PFAS triggers.
⚠Risky category by default
Reebok
Men's Featherweight Performance Long Leg Boxer Briefs
polyester/nylon blend with elastane
Lower concern. No evidence of PFAS, but no transparency.
⚠Risky category by default
Reebok
Men's Cooling Performance Boxer Briefs
Polyester, elastane blend
Lower concern. Standard athletic boxers without water-resistant treatment.
⚠Risky category by default
Reebok
Men's Tech Comfort Sport Soft Boxer Briefs
Cotton/synthetic blend, no known treatment
Lower PFAS risk. Casual underwear typically avoids treatments.
⚠Risky category by default
Reebok
Mens Boxer Briefs - 6 Pack Big & Tall 7" Inseam Moisture Wicking Performance Mens Underwear Boxers with Contour P
Cotton/polyester blend, moisture-wicking performance fabric
Lower concern. Basic performance underwear without water-resistant or stain-guard treatments.
⚠Risky category by default
New Balance
Men's Mesh 5 No Fly Boxer Brief
Mesh polyester, elastane blend
Lower concern. Basic mesh brief with no water-resistant coatings.
⚠Risky category by default
New Balance
Men's Premium 3 Inch Trunk No Fly
nylon mesh and polyester liner, no waterproofing treatment
Lower concern. Uncoated athletic trunk, no water-resistant coating typically applied.
⚠Risky category by default
New Balance
Men's Moisture Wicking Lightweight Breathable Boxer Briefs
polyester/nylon blend with moisture-wicking finish
Lower concern. Boxer briefs lack typical water-repellent coating finishes where PFAS is common.
⚠Risky category by default
New Balance
Women's Athletics Brief 2.0
nylon and elastane blend
Lower concern. No waterproofing or stain treatment typical.
⚠Risky category by default
New Balance
Women's Athletics Brief v3
Nylon/polyester athletic brief, no water-repellent coating specified
Lower concern; no evidence of PFAS treatment applied.
⚠Risky category by default
New Balance
Men's Premium Performance 3" Trunk Underwear 2-Pack
polyester and elastane blend
Lower concern. Bare synthetic blend with no waterproof or stain treatments.
⚠Risky category by default
New Balance
Men's Mesh No Fly Boxer
Mesh polyester/nylon blend
Mesh boxer with minimal treatment risk; no PFAS disclosure found.
⚠Risky category by default
Fruit of the Loom
Men's Coolsoft Boxer Briefs
cotton/polyester blend, no stated treatment
Lower concern. Basic underwear unlikely to need PFAS treatments.
⚠Risky category by default
Fruit of the Loom
Women's Breathable Cooling Stripes Brief Underwear
Cotton blend (likely cotton-polyester), no special coating disclosed
Lower concern. Basic underwear with no disclosed water-resistant treatment.
⚠Risky category by default
Fruit of the Loom
Men's 360 Stretch Max Flex Boxer Briefs
Cotton and elastane blend, no stated treatment
Lower concern; bare cotton blend with no waterproofing claimed.
⚠Risky category by default
Fruit of the Loom
Men's 3 Pack Breathable Mesh Boxer Briefs
cotton/polyester blend, breathable mesh
Lower concern; basic cotton-blend boxers without water-repellent coating treatment.
⚠Risky category by default
Fruit of the Loom
Women's Breathable Micro-Mesh High-Cut Briefs (6
nylon and elastane micro-mesh, untreated
Lower concern. Basic intimates, no water-repellent coating or stain treatment applied.
⚠Risky category by default
Fruit of the Loom
Men's Breathable Mesh Boxer Briefs
Cotton and polyester blend, uncoated
Lower concern. Basic cotton-poly underwear without waterproofing.
⚠Risky category by default
Fruit of the Loom
Women's Breathable Micro-Mesh Low-Rise Briefs (6
polyester, elastane blend (mesh)
Lower concern. Basics underwear, no PFAS-prone finishes.
⚠Risky category by default
Brooks
Women's PR Elite Bra
Nylon, spandex blend with mesh
Lower concern. Sports bra with no reported PFAS-treated finishes.
⚠Risky category by default
Brooks
Women's Limitless Racerback Sports Bra
Nylon, spandex blend fabric
Lower concern. Standard athletic bra without water-resistant coating.
⚠Risky category by default
Brooks
Brothers Men's Supima Cotton Boxer Briefs
Supima cotton, no surface treatment disclosed
Lower PFAS concern; basic cotton underwear unlikely to contain forever chemicals.
⚠Risky category by default
Brooks
Brothers Men's 3-Pack Cotton Boxers
100% cotton
Lower PFAS concern. Basic cotton boxers with no surface treatments.
⚠Risky category by default
Brooks
Women's Chaser Padded Running Bra
nylon, polyester, elastane blend
Lower concern; typical athletic bra with no water-repellent coating or special coatings.
⚠Risky category by default
Lululemon
Men's lululemon Always In Motion Boxer Brief 5" 3 Pack
Nylon/polyester blend with elastane
Lower concern. Synthetic athletic briefs without water-repellent coating or stain treatments.
⚠Risky category by default
Lululemon
Soft Stretch Active Boxer Briefs
Nylon/spandex blend, no water-repellent treatment
Lower PFAS concern. Base fabrics are inherently PFAS-free.
⚠Risky category by default
Lululemon
Always In Motion Boxer Brief 3" 5 Pack
nylon/elastane blend, no stated treatment
Lower concern. Soft fabric, no water-repellent coating disclosed.
⚠Risky category by default
Lululemon
Always In Motion Boxer 5" 7 Pack
Nylon/spandex blend, no documented coating
Lower concern. Bare synthetic blend, no known water treatment applied.
⚠Risky category by default
Lululemon
Soft Stretch Active Boxer Brief 7" 3 Pack
nylon and spandex blend
Lower concern, but Lululemon provides no PFAS transparency.
⚠Risky category by default
Lululemon
UnderEase Mid-Rise Bikini Underwear 3-Pack
Nylon blend with elastane
Lower concern. No PFAS-prone features identified in standard underwear.
⚠Risky category by default
Lululemon
Underease Super-High-Rise Shortie Underwear Women's
nylon and spandex blend
Lower concern. No water-repellent coating treatment typical for basic intimates.
⚠Risky category by default
Champion
Men's Wear360 Moisture-Wicking Articulated Shaping Boxer Briefs (5
polyester blend, moisture-wicking synthetic fabric
Likely lower concern; no water-repellent coating finish suspected in boxer brief.
⚠Risky category by default
Champion
Men's Active Performance Breathable Boxer Briefs
cotton/polyester blend, breathable knit
Basic underwear with lower PFAS concern.
⚠Risky category by default
Champion
Men's Lightweight & Breathable Stretch Boxer Brief
Cotton/polyester blend, no stated water-resistant treatment
Lower concern. Bare fabric without water-repellent coating finish reduces PFAS risk.
⚠Risky category by default
Champion
Men's Stretchy Performance Boxer Briefs
Cotton blend, elastane stretch
Lower concern. Basic cotton blend underwear without chemical treatments.
⚠Risky category by default
Champion
Men's 3-Pack Flexible Fit Moisture-Wicking Boxer Briefs
Cotton blend with elastic/polyester, moisture-wicking treatment unspecified
Lower concern. Base material safe, treatment agents undisclosed.
⚠Risky category by default
Champion
Men's Breathable Mid-Leg Boxer Briefs
cotton/synthetic blend, no stated treatment
Lower concern. No waterproof coating typical for breathable boxers.
⚠Risky category by default
Champion
Men's Wear360 Moisture-Wicking Longer Leg Boxer Briefs
Polyester blend, moisture-wicking, no disclosed coating
Lower concern. Basic synthetic athletic briefs lack typical PFAS triggers.
⚠Risky category by default
Champion
Men's Iconic Essentials Wicking Boxer Briefs
polyester/elastane blend, moisture-wicking synthetic
Lower concern, no waterproof treatment expected in basic boxer briefs.
⚠Risky category by default
Jockey
Men's ActiveStretch Brief
Nylon/elastane blend, no disclosed finish
Lower concern. No waterproofing or special finishes disclosed.
⚠Risky category by default
Jockey
Men's RapidCool Brief
polyester/nylon blend with moisture-wicking finish
Lower concern. Moisture-wicking briefs unlikely to require PFAS treatments.
⚠Risky category by default
Jockey
Men's Jockey 2-Pack RapidCool Boxer Briefs
polyester blend with spandex, RapidCool moisture-wicking treatment (unspecified composition)
Likely lower concern, but no transparency on treatment chemistry.
⚠Risky category by default
Jockey
Men's Active Microfiber 4.5" Boxer
Microfiber polyester blend
Lower concern. Microfiber boxers unlikely to contain intentional PFAS.
⚠Risky category by default
Jockey
Men's Stability Pouch Microfiber Boxer Briefs
microfiber polyester, no reported treatment
Lower concern. Microfiber boxer briefs unlikely to contain intentional PFAS.
⚠Risky category by default
Jockey
Men's Active Microfiber 2.5" Trunk
polyester microfiber blend
Lower concern, but brand discloses nothing about PFAS treatment.
⚠Risky category by default
Jockey
Men's ActiveStretch 7" Long Leg Boxer Briefs
nylon, spandex blend with no reported coating
Lower concern. No PFAS-linked treatment disclosed for basic stretch boxer briefs.
⚠Risky category by default
Jockey
Generation Infinity Cool Boxer Briefs
polyester, spandex blend, no stated coating
Lower concern. Bare synthetic fibers without water-repellent coating treatment stated.
⚠Risky category by default
Gap
Men's 5" Breathe Boxer Briefs
cotton/polyester blend, no mentioned water-repellent coating
Lower concern. Basic boxer briefs without performance coatings.
⚠Risky category by default
Gap
Men's 5" Boxer Briefs
Cotton blend, elastic waistband
Lower concern; standard underwear with no known PFAS triggers.
⚠Risky category by default
Gap
Women's Breathe Shorty
Cotton blend (breathable apparel, no water-resistant treatment stated)
Lower concern. Uncoated cotton blend, no water-repellent coating finish disclosed.
⚠Risky category by default
Gap
Women's Breathe Hipster
Cotton blend hipster underwear, no reported treatment
Lower concern. Basic cotton blend with no disclosed water or stain treatment.
⚠Risky category by default
Gap
Women's Breathe Bikini by Gap
nylon/elastane blend, no evident water-resistant treatment
Lower concern. No water-resistant treatment claimed; basic blend apparel.
⚠Risky category by default
Gap
Old Navy Men's Go-Dry Cool Performance Boxer Briefs
polyester/nylon blend performance fabric
Lower concern; no water repellency treatment claimed or disclosed.
⚠Risky category by default
Gap
Women's Breathe Hipster Underwear 3-Pack
cotton, elastane blend, uncoated fabric
Lower PFAS concern. Bare cotton underwear unlikely to contain intentional PFAS.
⚠Risky category by default
Under Armour
Men's Under Armour Charged Cotton 6-inch Novelty Boxerjock 3-Pack
Cotton blend (Charged Cotton proprietary fabric)
Lower PFAS concern. Cotton boxers unlikely to contain intentional PFAS.
⚠Risky category by default
Under Armour
Men's Underwear & Socks Under Armour 3 6" Performance Boxerjock Boxer Briefs
polyester, spandex blend, no reported treatment
Lower concern. No waterproof or stain treatment typical for boxers.
⚠Risky category by default
Under Armour
Men's 3-Units Boxer Brief
polyester/nylon blend with elastane
Lower concern, but no public PFAS transparency from brand.
⚠Risky category by default
Under Armour
Men's Under Armour Performance Tech Mesh-Mod 6 in 3 Pack
polyester mesh, nylon blend
Performance athletic mesh without waterproofing, lower PFAS concern than water-repellent coating gear.
⚠Risky category by default
Under Armour
Men's Essential Tech Boxerjock 3-Pack
Nylon, spandex blend, no disclosed coatings
Lower concern. No coatings disclosed, inherently PFAS-risky finishes unlikely.
⚠Risky category by default
Under Armour
Men's 3-Pack Performance Cotton Boxerjock
Cotton blend with elastane
Lower concern. Bare cotton-blend undergarment with no performance coating.
⚠Risky category by default
Under Armour
Men's Performance Tech Mesh Boxer Briefs
polyester/nylon mesh blend, no water-resistant treatment disclosed
Lower concern; no water-repellent coating treatment typical for mesh briefs.
⚠Risky category by default
Fruit of the Loom
Men's Quick Dry & Moisture Wicking 360 Stretch Performance Boxer Briefs
Polyester/nylon blend with moisture-wicking treatment
Moisture-wicking performance fabrics may use PFAS.
⚠Waterproof or stain-proof treatment
New Balance
Men's Mesh Jersey Performance Wicking No Fly Boxer Briefs
polyester mesh with moisture-wicking finish
Skip until New Balance discloses moisture-wicking treatment details.
⚠Waterproof or stain-proof treatment
Brooks
Women's Drive Interlace Run Bra
nylon, elastane, polyester with water-repellent coating finish
Sports bra likely has water-repellent coating; Brooks silent on PFAS.
⚠Waterproof or stain-proof treatment
Lululemon
Always In Motion Boxer 5
nylon blend with water-repellent coating finish
Lululemon silent on PFAS; water-repellent coating treatment raises concern.
⚠Waterproof or stain-proof treatment
Gap
Old Navy Men's Go-Dry Cool Performance Boxer- Brief Underwear 3-Pack
Nylon/polyester blend with moisture-wicking treatment
Performance underwear likely uses water-repellent coating; Gap discloses nothing about PFAS.
⚠Waterproof or stain-proof treatment
Under Armour
Men's Tech
polyester blend with moisture-wicking treatment
Skip until brand discloses water-repellent coating treatment chemistry.
⚠Waterproof or stain-proof treatment
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