Performance Socks, ranked by PFAS safety
178 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.
Buyer’s guide
What to look for in performance socks, and which brands grade best and worst
Graded and flagged D and F, we’d swap these
Smartwool
4-Pack Everyday Athletic Crew Socks
merino wool blend (primary fiber)
Lower PFAS concern for basic merino socks, but Smartwool does not publicly disclose water-repellent coating chemistry.
⚠Risky category by default
Smartwool
Men's Hike Medium Crew Socks
Merino wool blend (primary), elastic, synthetic dyes
Lower PFAS concern for basic wool socks, but no transparency from Smartwool.
⚠Risky category by default
Darn Tough
Men's Run No Show Tab Ultra Lightweight
Merino wool blend
Lower concern; natural fiber socks unlikely to contain PFAS, but brand makes no transparency claim.
⚠Risky category by default
Darn Tough
Men's Run Micro Crew Ultra-Lightweight Running Socks
Merino wool blend, synthetic fibers (nylon/spandex)
Lower PFAS concern for a basic athletic sock; no evidence of water-repellent coating or fluorochemical treatment typical of this category.
⚠Risky category by default
Nike
Lightweight Running Crew Socks
Polyester/nylon blend, no reported water-resistant or stain-resistant treatment
Lower concern for typical lightweight running socks; no water-repellent coating treatment reported.
⚠Risky category by default
Nike
Everyday Max Crew Socks Men's
Cotton/polyester blend (no water-resistant treatment indicated)
Lower PFAS concern, basic crew socks with no water-repellent coating or stain-resistant finish.
⚠Risky category by default
Nike
Running Women Lightweight Socks
Polyester blend / nylon blend with elastic (typical athletic sock)
Lower PFAS concern for basic athletic socks; no evidence of water-repellent coating treatment or Teflon-type coating.
⚠Risky category by default
Nike
Midweight Running Crew Women Socks
polyester/nylon blend with elastane
Lower concern, basic athletic socks with no obvious PFAS triggers, but Nike discloses nothing.
⚠Risky category by default
Nike
Running Midweight Socks
polyester/nylon blend with elastane
Lower concern for typical use, but Nike does not disclose water-repellent coating chemistry.
⚠Risky category by default
Nike
Wool Micro crew Women socks
wool blend (merino wool primary)
Lower-concern choice; wool socks rarely require PFAS treatments, but Nike makes no explicit disclosure.
⚠Risky category by default
Nike
Everyday Elevated Socks
Cotton blend (primary); elastic/synthetic cuffs
Lower PFAS concern; basic socks without water-repellent coating or stain treatments, but no public transparency from Nike on PFAS practices.
⚠Risky category by default
Nike
Boys' 6-Pack Cushioned Crew Socks
cotton/polyester blend crew socks, cushioned construction
Lower PFAS concern; basic athletic socks without water treatment or specialty coatings.
⚠Risky category by default
Adidas
Men's Athletic Cushioned Crew 6-Pack Socks
Cotton-blend athletic socks, no reported coating
Lower concern, basic athletic socks with no known PFAS-prone treatments; buy with modest confidence.
⚠Risky category by default
Adidas
Men's Cushioned Comfort Crew Socks (3-Pack)
Cotton-blend knit (comfort socks, no water-resistance treatment documented)
Lower PFAS concern for basic crew socks; no water-repellent coating treatment reported, but no third-party verification of PFAS-free claim.
⚠Risky category by default
Adidas
RUNNING COMFY CREW Socks
Cotton and synthetic blend (polyester/elastane)
Lower PFAS concern for basic crew socks; no special coatings flagged.
⚠Risky category by default
Adidas
Athletic Cushioned Crew 6 Pairs
Cotton-blend crew socks, standard yarn construction
Lower concern; plain athletic socks rarely receive PFAS-intensive treatments, but Adidas has not disclosed materials or water-repellent coating chemistry.
⚠Risky category by default
Adidas
Men's 6 Pack Athletic No Show Socks
Polyester/nylon blend with cotton
Lower-concern basic socks with no known PFAS triggers, but Adidas provides no transparency.
⚠Risky category by default
Adidas
s adidas 6-Pack Superlite 3.0 No-Show Socks
Polyester blend with elastane
Lower concern, basic no-show socks with no PFAS-typical treatments; no red flags but also no transparency.
⚠Risky category by default
Adidas
Men's Athletic Cushioned Quarter Socks 6-Pack
Cotton/polyester blend athletic sock, no reported treatment
Lower PFAS concern for standard athletic socks, no waterproofing or stain treatment claimed.
⚠Risky category by default
Under Armour
Unisex Team Crew Socks with Odor Control
Polyester blend with odor-control treatment (unspecified)
Lower PFAS concern likely, but odor-control mechanism unconfirmed, proceed with moderate caution.
⚠Risky category by default
Under Armour
Men's Performance Tech No Show 6-Pack Socks
Polyester/nylon blend with moisture-wicking treatment (type unspecified)
Lower concern, but moisture-wicking treatment composition is not disclosed, request confirmation from Under Armour if PFAS-free matters to you.
⚠Risky category by default
Under Armour
Men's Under Armour Performance Tech 3 Pack Quarter Socks
polyester/nylon blend with elastane
Lower concern, basic athletic socks without water-repellent or stain-resistant finishes typically pose minimal PFAS risk.
⚠Risky category by default
Under Armour
Men's UA Performance Tech Cushioned Crew Socks
polyester/nylon blend with elastane, cushioned knit construction
Lower concern; standard athletic socks with no known PFAS triggers, but brand offers no transparency.
⚠Risky category by default
Under Armour
Unisex Performance Tech Low Socks (6-Pack)
polyester/nylon blend with elastane (spandex)
Lower PFAS concern for basic athletic socks; no water-repellent coating treatment disclosed, but limited public data on Under Armour's textile coatings.
⚠Risky category by default
Under Armour
Men's 6 Pack Performance Tech Crew Socks
Polyester blend with nylon; no disclosed water-resistant or stain-resistant treatment
Lower concern; standard athletic socks with no known PFAS-prone treatments, but no public commitment from brand.
⚠Risky category by default
Under Armour
Men's Performance Tech Unisex 6-Pack Low Socks
polyester/nylon blend with elastane
Lower concern, basic performance socks with no PFAS-trigger features, but Under Armour provides no transparency.
⚠Risky category by default
Smartwool
Women's Run Zero Cushion Low Ankle Socks
Merino wool blend (primarily wool fibers)
Lower concern; wool socks carry minimal PFAS risk, but Smartwool's treatment details remain undisclosed.
⚠Risky category by default
Smartwool
Bike Low Ankle Zero Cushion Socks Men's
Merino wool blend (likely polyester/nylon blend for durability)
Lower concern; merino-based socks are unlikely PFAS sources, but no brand transparency on finishes.
⚠Risky category by default
Smartwool
Everyday Athletic Low Ankle Socks
Merino wool blend (primary); elastic/nylon components
Lower concern, natural fiber socks with no known PFAS risk, but Smartwool lacks public PFAS transparency.
⚠Risky category by default
Smartwool
Men's Hike Light Cushion Ankle Socks
merino wool blend with nylon/elastane
Lower-concern base fiber; no water-resistant coating typical of hiking socks reduces PFAS risk.
⚠Risky category by default
Smartwool
Men's Run Zero Cushion Ankle Socks
Merino wool blend (primarily wool with synthetic reinforcement)
Lower-concern choice; wool-based construction avoids obvious PFAS triggers, but Smartwool has not disclosed treatment details.
⚠Risky category by default
Darn Tough
Men's Run No Show Tab Cushion 2-Pack
merino wool blend, nylon, spandex
Lower PFAS concern; standard athletic socks without water-repellent coating or stain treatments typical of PFAS use.
⚠Risky category by default
Darn Tough
Men's Limited Edition Run No Show Tab 2-Pack
Merino wool blend (primary fiber)
Lower PFAS concern for core fiber; water-repellent coating treatment status unclear, contact Darn Tough to confirm.
⚠Risky category by default
Darn Tough
Women's Run No Show Tab Cushion 2-Pack
Merino wool blend, synthetic fibers (nylon/polyester), no disclosed water treatment
Lower concern; no water-repellent treatment typical for casual run socks, but verify with brand on water-repellent coating additives if ordered.
⚠Risky category by default
Darn Tough
Men's Ridge Runner Micro Crew Ultra-Lightweight Running Socks
merino wool blend (wool, nylon, spandex)
Lower PFAS concern, basic sock without water-repellent or stain-resistant finishes.
⚠Risky category by default
Balega
Hidden Comfort Socks
Nylon, spandex blend (elastic fiber)
Lower concern, standard athletic sock with no known PFAS use, but no brand transparency.
⚠Risky category by default
Balega
Men's Hidden Comfort No Show Running Socks
nylon/polyester blend (moisture-wicking synthetic fiber)
Lower-concern baseline socks; no water-repellent coating or treatment signals, but brand discloses nothing about PFAS practices.
⚠Risky category by default
Balega
UltraGlide No Show
Nylon/polyester blend with moisture-wicking fibers
Lower concern, synthetic athletic socks without known waterproofing or stain-resistant coatings.
⚠Risky category by default
Balega
Hidden Comfort Performance No Show Multipacks/Bundles Athletic Running Socks for Men and Women 6 Pairs, Adult Unisex, Size: XL, Gray
Nylon/polyester blend athletic socks, no special coating disclosed
Lower PFAS concern; plain athletic socks with no waterproof or stain-resist treatment.
⚠Risky category by default
Balega
Silver No Show Socks
Merino wool blend with nylon/polyester
Lower-concern baseline athletic sock; no water-repellent coating treatment typical for this category, but brand transparency on PFAS absent.
⚠Risky category by default
Balega
Enduro Crew Socks
Merino wool blend, nylon, elastane
Lower-concern choice; merino socks unlikely to use water-repellent coating treatments, but Balega offers no public PFAS transparency.
⚠Risky category by default
Bombas
Women's Bombas All-Purpose Performance Ankle Sock
Cotton-blend yarn, no reported water-repellent or stain-resistant treatment
Lower PFAS concern, untreated cotton-blend sock with no water-repellent coating or stain finishes reported.
⚠Risky category by default
Bombas
Women's All-Purpose Cotton Blend Ankle Socks
Cotton blend (majority cotton, synthetic blend unspecified)
Lower concern; basic cotton-blend socks with no known water-repellent coating or stain treatments, but Bombas doesn't disclose full fiber content.
⚠Risky category by default
Bombas
Men's Bombas Lightweight Athletic Ankle Sock 3-Pack
Cotton blend (primary fibers, no reported specialty coatings)
Lower-concern everyday socks; no known PFAS triggers, but brand offers no transparency.
⚠Risky category by default
Bombas
Men's Bombas Running Calf Socks
Merino wool blend (primary); elastic/synthetic blend (cuff)
Lower PFAS concern for the sock itself; limited transparency on elastic components.
⚠Risky category by default
Bombas
Women's Bombas Running Quarter Sock 3-Pack
Polyester/nylon blend sock with no known fluorochemical treatment
Lower-concern basic performance sock; no PFAS triggers identified, but no public disclosure either.
⚠Risky category by default
Bombas
Men's Half Calf Cotton Blend Socks
Cotton blend (primary); elastic, dyes, potential finishing treatments
Lower-concern baseline; untreated cotton blend socks unlikely to contain intentional PFAS, but Bombas discloses nothing.
⚠Risky category by default
Bombas
Women's Bombas UltraLite Sport Lightweight Ankle Socks
Nylon, polyester, elastane blend
Lower-concern everyday socks with no known PFAS triggers, but no explicit brand commitment.
⚠Risky category by default
Bombas
Men's Bombas All Sport Ankle Sock 4-Pack
Cotton-blend (cotton, polyester, nylon, elastane)
Lower concern, basic athletic sock with no known PFAS-prone features; Bombas has not published PFAS statements.
⚠Risky category by default
Merrell
Unisex Wool Ankle Socks (3 Pairs)
Merino wool blend (primary), elastane/nylon reinforcement (heel/toe)
Lower PFAS concern, wool socks have no typical water-repellent coating or stain-resist triggers, but no public PFAS commitment from Merrell.
⚠Risky category by default
Merrell
Recycled Everyday Crew Sock 3 Pack
recycled polyester/nylon blend with standard yarn construction
Lower concern, basic crew socks with no known PFAS triggers, though no explicit brand commitment.
⚠Risky category by default
Merrell
Trekker Outdoor Crew Socks (3 Pack)
Merino wool blend, acrylic, nylon (standard outdoor sock fibers)
Lower concern, conventional outdoor sock materials with no known PFAS history, but no brand transparency.
⚠Risky category by default
Merrell
Eco Cushioned Crew 3-Pack
Cotton blend crew socks
Lower concern for basic cotton socks; no water-repellent treatment typical, but brand makes no PFAS disclosure.
⚠Risky category by default
Merrell
Everyday Socks for Men | Black | Size Large/XL | Stretchy Fabric | Moisture Wicking
Synthetic blend (likely nylon/polyester with elastane), no water-repellent finish specified
Lower concern; everyday socks with no water-repellent coating treatment claimed, likely to avoid PFAS, but verify fiber content if concerned.
⚠Risky category by default
Merrell
Unisex Cushioned Midweight Crew Socks (4 Pair Pack)
Cotton/polyester blend sock (likely 80+ cotton)
Lower concern; standard crew socks with no water-repellent or stain-resistant features that would trigger PFAS use.
⚠Risky category by default
Merrell
Logo Printed Performance Crew Socks
Polyester/nylon blend performance sock fabric, likely no specialty coating
Lower concern; basic performance socks with no known waterproofing or stain treatment triggers.
⚠Risky category by default
Merrell
Repreve Low-Cut Tab Socks
Repreve polyester (recycled fiber blend); cotton blend socks
Lower PFAS concern; natural fiber base with no known water-repellent coating.
⚠Risky category by default
Stance
Athletic Crew Socks
Cotton/synthetic blend athletic socks, no reported Teflon-family coating
Lower PFAS concern for basic athletic socks; standard textile category with no known water-repellent coating or stain-resist treatment.
⚠Risky category by default
Stance
Runner Light Crew Black Socks
Cotton blend (primary fiber, no coating disclosed)
Lower concern, basic cotton-blend socks with no reported PFAS treatment, though brand offers no public commitment.
⚠Risky category by default
Stance
Run Light Tab 3 Pack Socks
Cotton-blend athletic socks (primary cellulose fiber)
Lower PFAS concern; basic athletic socks with no water-repellent coating or performance coatings typical of high-risk apparel.
⚠Risky category by default
Stance
Run Light Crew 3 Pack Socks
Cotton, polyester, nylon blend
Lower concern for typical daily socks, but Stance has not publicly disclosed PFAS management.
⚠Risky category by default
Stance
Franchise Ul Crew 3 Pack Socks
Cotton blend crew socks
Lower PFAS concern for basic crew socks; conventional textile without known treatments.
⚠Risky category by default
Stance
Run Light Tab
Merino wool blend (primary fiber); tab reinforcement material unspecified
Lower concern for typical athletic socks; no PFAS red flags, though water-repellent coating status uncertain.
⚠Risky category by default
Stance
Women's Run Light Quarter
Merino wool blend, nylon, elastane
Lower-concern sports sock; no known PFAS triggers, but Stance hasn't publicly disclosed treatment chemistry.
⚠Risky category by default
Stance
Run UL Tab
Merino wool blend socks
Lower-concern baseline; no PFAS treatment typical for merino running socks, but brand offers no transparency.
⚠Risky category by default
Injinji
Run Lightweight No-Show
Merino wool blend with nylon
Lower PFAS concern for a performance sock; no waterproofing or stain treatment disclosed.
⚠Risky category by default
Injinji
Run Lightweight Crew
merino wool blend (primary); nylon/spandex blend
Lower PFAS concern, minimalist sock with no known water-resistant treatment; verify with brand if unsure.
⚠Risky category by default
Injinji
Trail Midweight Crew Socks
Merino wool blend with synthetic fibers; no water-repellent coating disclosed
Lower concern; no water-repellent coating treatment apparent, but lack of transparency limits certainty.
⚠Risky category by default
Injinji
Wool Liner Crew Socks
Merino wool liner, nylon blend
Lower concern choice, wool liner socks lack typical PFAS applications, but brand offers no transparency.
⚠Risky category by default
Injinji
Run Lightweight Mini-Crew
Merino wool blend (primary) with nylon reinforcement
Lower PFAS concern; merino-blend running socks lack typical water-repellent coating triggers, but brand silence limits full assurance.
⚠Risky category by default
Injinji
Run Midweight No-Show
Nylon/polyester blend athletic sock, no treatment claims
Lower concern; untreated synthetic athletic sock with no known PFAS application pathway.
⚠Risky category by default
Injinji
Men's Ultra Run Mini-Crew Socks
Nylon blend with merino wool (no water-repellent coating disclosed)
Lower concern, no waterproof finish disclosed, but lack of transparency keeps confidence moderate.
⚠Risky category by default
Patagonia
Merino Wool Blend Crew Socks
Merino wool blend (wool, synthetic fibers)
Lower PFAS concern; merino wool blend socks without waterproofing or stain treatment pose minimal risk.
⚠Risky category by default
Patagonia
ULW Liner Socks
Merino wool blend (likely polyester/nylon)
Lower PFAS concern for basic merino sock; Patagonia's silent stance leaves some uncertainty.
⚠Risky category by default
Patagonia
Merino Wool Blend Knee Socks
Merino wool blend (primary fibers, no water-repellent finish specified)
Lower-concern baseline merino socks; no PFAS red flags, but Patagonia doesn't publicly disclose water-repellent coating chemistry.
⚠Risky category by default
Patagonia
Ultralightweight Liner Socks
Merino wool blend, synthetic fibers (likely polyester/nylon), no reported water-repellent coating
Lower concern, ultralight liner socks use minimal treatment, but confirm fiber content with retailer.
⚠Risky category by default
Patagonia
Merino Wool-Blend Crew Socks for trail comfort.
Merino wool blend, no water-repellent finish specified
Lower concern, merino blend socks unlikely to contain PFAS unless treated with water-repellent coating finish not listed.
⚠Risky category by default
Patagonia
Lightweight Merino Performance Crew Socks
Merino wool blend, knit construction
Lower PFAS concern for natural fiber socks, but Patagonia's silence on water-repellent coating treatment is a gap.
⚠Risky category by default
Patagonia
Ultra Lightweight Merino Wool Ankle Socks Black S
merino wool blend, no water-repellent treatment disclosed
Lower PFAS concern; untreated merino wool socks present minimal risk.
⚠Risky category by default
Patagonia
Outdoor Socks
merino wool blend (wool/synthetic fiber)
Lower-concern baseline socks, but Patagonia makes no public PFAS disclosure.
⚠Risky category by default
Allbirds
Anytime Crew Socks
Merino wool blend (primary); elastic/synthetic reinforcement
Lower PFAS concern; natural fiber socks with no known water-repellent coating or stain treatment.
⚠Risky category by default
Allbirds
Anytime Ankle Socks
Merino wool blend (likely wool/nylon/elastane)
Lower PFAS concern; basic sock without water-repellent or stain-resistant treatment.
⚠Risky category by default
Allbirds
Anytime No Show Sock
Merino wool blend, nylon, elastane
Lower PFAS concern for a basic sock; no water-resistant treatment identified, but brand transparency on materials could be stronger.
⚠Risky category by default
Allbirds
Anytime No Show Sock 3-Pack - Blizzard
Cotton blend (primary) with standard knit construction
Lower concern, plain cotton sock with no water-resistant or stain-treatment claims typical of PFAS use.
⚠Risky category by default
Allbirds
Anytime Crew Sock - Natural Grey Heather/Light Grey
Merino wool blend (primary); elastic/synthetic blend cuff
Lower PFAS concern for a basic wool sock, but no brand transparency on dyes or elastic components.
⚠Risky category by default
Allbirds
Anytime No Show Sock 3-Pack - Natural Black
Cotton-blend knit sock (primary material)
Lower concern, basic cotton sock with no water-resistant treatment, but brand makes no PFAS disclosure.
⚠Risky category by default
Allbirds
Anytime Ankle Sock - Blizzard/Royal Blue
Merino wool blend with synthetic fibers (nylon/polyester)
Lower PFAS concern for a basic merino ankle sock, but Allbirds has not publicly committed to PFAS-free production.
⚠Risky category by default
Allbirds
Anytime No Show Heel Grip Socks
Merino wool blend with synthetic grip coating (composition unspecified)
Lower-risk socks; no known PFAS triggers, but grip coating composition is opaque.
⚠Risky category by default
Brooks
Ghost Lite Quarter Socks 2-Pack
Nylon blend with elastane, no water-repellent treatment disclosed
Lower PFAS concern likely, basic performance socks without specialty coatings.
⚠Risky category by default
Brooks
Run-In Quarter 3-Pack Socks
Nylon/polyester blend athletic socks, no stated water-repellent treatment
Lower concern: basic athletic socks without water-repellent coating or stain-resistant finishes pose minimal PFAS risk.
⚠Risky category by default
Brooks
Ghost Lite Crew 2-Pack
Cotton blend crew socks
Lower-concern basic socks; no fluorochemical reason to suspect PFAS, but Brooks makes no public disclosure.
⚠Risky category by default
Brooks
Run-In Crew 3-Pack Socks
Cotton/polyester blend athletic socks
Lower-concern basic socks; no evidence of PFAS treatments, but brand offers no transparency.
⚠Risky category by default
Brooks
Run In 3 Pack Socks
Cotton/polyester blend (athletic socks)
Lower-concern basics; no PFAS-risk features, but brand offers no transparency.
⚠Risky category by default
Brooks
Ghost Crew Socks
Cotton blend (polyester/nylon) with elastic
Lower concern, basic crew socks with no known PFAS triggers, but no transparency from Brooks.
⚠Risky category by default
Brooks
Ghost Lite No Show 2-Pack
Cotton/nylon blend no-show socks
Lower PFAS concern, basic sock with no waterproofing or water-repellent coating treatment identified.
⚠Risky category by default
Brooks
High Point Crew Socks
cotton blend (merino wool/polyester)
Lower concern: basic crew socks without water-repellent or stain-resistant finishes typically avoid PFAS.
⚠Risky category by default
Carhartt
Men's Force Midweight Crew Socks (2-Pack)
Cotton blend (primary fiber, no special coating disclosed)
Lower PFAS concern; standard cotton socks unlikely to contain fluorochemicals, but no brand transparency.
⚠Risky category by default
Carhartt
Men's Force Midweight Logo Short Crew Sock 3 Pack
Cotton/synthetic blend midweight crew socks; no special coatings disclosed
Lower concern for basic crew socks; no evidence of PFAS-prone treatments in standard cotton-blend construction.
⚠Risky category by default
Carhartt
Men's Force Midweight Quarter Socks (3-Pack)
Cotton blend (no water-repellent coating or stain treatment disclosed)
Lower PFAS concern for basic midweight socks without water/stain treatments.
⚠Risky category by default
Carhartt
Men's 3-Pack Force Midweight Low Cut Socks
Cotton/polyester blend (no finish treatment disclosed)
Lower PFAS concern; basic socks with no water/stain treatment implied.
⚠Risky category by default
Carhartt
Women's 3-Pack Force Midweight Low Cut Socks
Cotton/polyester blend, no reported water-repellent coating or performance coating
Lower concern, basic socks with no performance treatments typical of PFAS application.
⚠Risky category by default
Carhartt
Men's Force Performance Crew Work Socks
Cotton-blend textile (no special coating disclosed)
Lower PFAS concern, basic work socks with no waterproofing or stain treatment claims.
⚠Risky category by default
Carhartt
Men's Midweight Cotton-Tencel Logo Crew Sock 3 Pack
Cotton-Tencel blend, no waterproofing or performance coating specified
Lower PFAS concern for a basic cotton-blend sock with no water-resistant or stain-resistance treatment.
⚠Risky category by default
Carhartt
Force Midweight Crew Sock 2-Pack
Cotton-blend crew sock, no specialty coating
Lower-concern baseline sock; no water-repellent coating/stain treatment triggers, but brand makes no PFAS statement.
⚠Risky category by default
Feetures
Elite Max Cushion No Show Tab
Merino wool blend, nylon, spandex
Lower concern for PFAS; no water-repellent coating treatment typical of this sock category, but brand transparency lacking.
⚠Risky category by default
Feetures
Elite Ultra Light No Show Tab Feetures
merino wool blend, synthetic fibers
Lower-concern choice; merino socks unlikely to contain PFAS, but brand provides no transparency.
⚠Risky category by default
Feetures
Elite Max Cushion No Show Tab Socks
Polyester/nylon blend athletic sock, no known water-resistant coating
Lower PFAS concern, no evidence of water repellency treatment or Teflon-family coating typical of performance socks.
⚠Risky category by default
Feetures
High Performance Ultra Light Quarter
Polyester blend with merino wool
Lower PFAS concern; basic athletic sock with no known performance coatings.
⚠Risky category by default
Feetures
Elite Light Cushion No Show Tab
Merino wool blend with nylon reinforcement
Lower PFAS concern; natural-fiber athletic socks with no known treatment requiring fluorochemicals.
⚠Risky category by default
Feetures
Elite Light Cushion No Show Tab 3-Pair Pack
Merino wool blend; no water-repellent coating or water-resistant coating disclosed
Lower-concern baseline; no PFAS triggers evident, but brand discloses nothing about treatments.
⚠Risky category by default
Feetures
High Performance Cushion Quarter
Merino wool blend (primary); cushioned textile construction
Lower-concern athletic socks; no known PFAS triggers, but silence from brand limits certainty.
⚠Risky category by default
Feetures
Elite Light Cushion Quarter
Nylon blend athletic socks with merino wool
Lower concern socks with no PFAS red flags, though Feetures hasn't publicly disclosed treatment details.
⚠Risky category by default
Fox River
Men's Wick Dry Classic Crew Socks
Merino wool blend, acrylic, nylon
Lower concern, basic moisture-wicking socks with no obvious PFAS-prone treatments, but brand offers no reassurance.
⚠Risky category by default
Fox River
Wick Dry Classic Quarter Crew Socks
merino wool blend, acrylic, polyester
Lower PFAS concern, basic sock with no water-repellent finish, but brand makes no public PFAS commitment.
⚠Risky category by default
Fox River
Men's Explorer Wick-Dry Socks
Merino wool blend, acrylic, nylon; no Teflon-type coating or Teflon-family coating disclosed
Lower concern; conventional sock with no known PFAS-prone treatments, but no transparency on moisture-wicking chemistry.
⚠Risky category by default
Fox River
Men's Fox River Basecamp 2.0 Ankle Socks
Merino wool blend (primary material)
Lower PFAS concern for a basic wool-blend sock with no waterproofing claims.
⚠Risky category by default
Fox River
Men's Physical Trainer Lightweight Quarter Crew Socks (2 Pack)
Acrylic, nylon, polyester blend; no waterproofing or stain treatment disclosed
Lower PFAS concern, plain athletic socks with no water/stain treatment claimed.
⚠Risky category by default
Hanes
Men's Absolute Run Moisture Wicking Socks (4-Pair)
Polyester/nylon blend, moisture-wicking fiber
Lower concern; conventional athletic socks with no known PFAS triggers, but no transparency.
⚠Risky category by default
Hanes
Men's Absolute Active Cushioned Crew, Moisture Wicking Socks, Seamless Toe, 4-Pack
Cotton/polyester blend with moisture-wicking finish
Lower concern, plain socks with no PFAS-prone treatments, but Hanes hasn't publicly committed to PFAS avoidance.
⚠Risky category by default
Hanes
Men's FreshIQ Midweight Moisture Wicking Crew Socks (8-Pack)
Cotton/polyester blend with moisture-wicking fibers
Lower PFAS concern, basic socks with no water-repellent coating or stain-resistant treatment claimed.
⚠Risky category by default
Hanes
Men's Cool DRI Crew Socks with Ventilation (3-Pairs)
Cotton/polyester blend with moisture-wicking fibers; no reported chemical finish
Lower concern, basic crew socks with no known water-resistant finish or PFAS-prone coatings.
⚠Risky category by default
Hanes
Men's Moves Impact Zone Cushioned X-Temp Moisture-Wicking
Polyester/nylon blend with X-Temp moisture-wicking finish
Lower PFAS concern; standard athletic underwear without water-repellent treatment, but no transparency from brand.
⚠Risky category by default
Hanes
Men's Absolute Active Cushioned Heel Shield
cotton/polyester blend with cushioned heel (polyurethane foam or EVA)
Lower concern; basic athletic sock with no known PFAS triggers, but Hanes provides no transparency.
⚠Risky category by default
Hanes
Men's Moves Performance Moisture-Wicking Ankle Socks (6-Pack)
polyester/nylon blend with cotton
Lower PFAS concern, but Hanes makes no public disclosure, standard performance socks without water-repellent or stain-resistant finish.
⚠Risky category by default
Icebreaker
Men's Run+ Ultralight Micro Socks
Merino wool blend (primary); elastic/synthetic reinforcement
Lower PFAS concern, merino wool socks unlikely to require water-repellent coating treatment, but no public disclosure from Icebreaker.
⚠Risky category by default
Icebreaker
Men's Run+ Ultralight Mini Crew Socks
Merino wool blend (likely wool/synthetic base)
Lower PFAS concern; natural-fiber socks with no evidence of water-repellent coating treatment, but brand transparency absent.
⚠Risky category by default
Icebreaker
Men's Ultralight Crew Socks
Merino wool blend (primary); elastane/nylon reinforcement
Lower concern for typical use; merino socks rarely need PFAS water-repellent coating, but Icebreaker's treatment practices are undisclosed.
⚠Risky category by default
Icebreaker
Women's Run+ Ultralight Mini Socks
merino wool blend (wool/synthetic fibers)
Lower-concern baseline: merino socks rarely require water-repellent coating treatment, but verify fiber blend composition if PFAS-sensitive.
⚠Risky category by default
Keen
Women's Victoria Crew Lite Socks1
Merino wool blend, nylon reinforcement
Lower concern, wool socks unlikely to contain PFAS, but Keen has not publicly disclosed their treatment practices.
⚠Risky category by default
Keen
Women's Hiking Light Crew Socks Size Medium 7-9.5 2 Pairs
Merino wool blend and synthetic fibers
Lower concern for PFAS, but Keen provides no public disclosure on water-repellent coating treatment chemistry.
⚠Risky category by default
Keen
Men's Basecamp 2.0 Lightweight Quarter Crew Hiking Sock
Merino wool blend
Lower PFAS concern; conventional hiking sock with no water-repellent treatment disclosed.
⚠Risky category by default
Keen
Canyon Lightweight Sock, Kenetrek
Merino wool blend, nylon
Lower concern; natural fiber base without known water treatments, but Kenetrek silent on PFAS transparency.
⚠Risky category by default
Keen
Kane Structure Crew Socks
Merino wool blend, synthetic fibers
Lower concern, basic crew socks with no water/stain treatments typical of the category, but Keen lacks public PFAS transparency.
⚠Risky category by default
ASSOS
R Socks S9 Twin Pack Cycling Socks
Merino wool blend, synthetic fibers
Lower concern, cycling socks without water-repellent finish; modest PFAS risk unless brand adds hidden water-repellent coating treatment.
⚠Risky category by default
ASSOS
GT Socks C2
Merino wool blend (primary); standard yarn dyeing and finishing
Lower concern, natural fiber socks with no public PFAS risk indicators, but brand transparency is minimal.
⚠Risky category by default
ASSOS
Endurance Socks S11
Merino wool blend (primary fiber)
Lower-concern socks; natural fiber base unlikely to require PFAS treatments, but no public disclosure from ASSOS.
⚠Risky category by default
ASSOS
Signature Socks Evo
Merino wool blend with synthetic fibers (likely polyamide/nylon)
Lower PFAS concern, but merino-synthetic blends warrant caution without explicit disclosure.
⚠Risky category by default
ASSOS
TRAIL Socks EVO blackSeries SALE
Merino wool blend (primary); standard textile fibers
Lower concern; typical athletic socks with no known PFAS triggers, but ASSOS offers no public PFAS commitment.
⚠Risky category by default
ASSOS
R Socks Twin Pack
Merino wool blend (primary), nylon/elastane components
Lower PFAS concern; natural-fiber socks without typical treatment triggers, but brand transparency is absent.
⚠Risky category by default
Bridgedale
Men's Midweight T2 Merino Sport Crew Socks
Merino wool blend (no chemical treatments disclosed)
Lower concern; merino wool base carries minimal inherent PFAS risk, but no transparency on dyes or finishing processes.
⚠Risky category by default
Bridgedale
Men's Lightweight T2 Merino Sport 3/4 Crew Socks
Merino wool blend (primary), elastane/spandex (minor)
Lower-concern socks, merino is intrinsically PFAS-free, but no water-repellent coating confirmation.
⚠Risky category by default
Bridgedale
Ultra Fit Merino Over-Calf Socks
Merino wool blend (primary fiber)
Lower PFAS concern; merino wool socks rarely require water-repellent coating treatments that introduce PFAS.
⚠Risky category by default
Bridgedale
Running Socks
Merino wool blend with synthetic fibers (polyamide/nylon, elastane)
Lower PFAS concern typical for wool running socks, but no brand transparency on water-repellent coating finishes.
⚠Risky category by default
Bridgedale
Men's Trail Run Ultralight T2 Merino Sport Crew Socks
Merino wool blend, no water-repellent coating (water-repellent coating) treatment disclosed
Lower PFAS concern, merino base with no stated water treatment, but Bridgedale transparency on coatings unclear.
⚠Risky category by default
Bridgedale
Men's Coolmax Sport 3/4 Socks
Coolmax polyester blend with merino wool or nylon
Lower PFAS concern, synthetic sport sock with no waterproofing, but brand discloses nothing.
⚠Risky category by default
Bridgedale
Women's Trail Run Ultra Light T2 Merino Sport Low Socks
Merino wool blend (primary fiber); minimal treatment
Lower PFAS concern, natural merino fiber unlikely to contain PFAS, but brand makes no explicit statement.
⚠Risky category by default
Experia
Thorlo Women's Experia Coolmax Crew Socks
Coolmax polyester blend, no stated coating
Lower PFAS concern; plain polyester socks with no water-repellent finish to justify PFAS use.
⚠Risky category by default
Experia
Thorlo Experia X Speed Performance Cushion Ankle
Merino wool blend / cushioned knit sock
Lower PFAS concern; typical performance sock with no known fluorinated finishes.
⚠Risky category by default
Experia
Thor-Lo Experia TECHFIT Light Cushion Ankle Socks
Nylon blend with cushioning, no specified waterproof treatment
Lower PFAS concern; basic athletic socks without water-repellent coating or stain treatments typical of PFAS use.
⚠Risky category by default
Experia
Thorlos Thorlos Experia Low Cut 3-pair Pack
Cotton/polyester blend with moisture-wicking fiber
Lower PFAS concern; standard athletic sock with no waterproofing or special coatings.
⚠Risky category by default
Experia
XECU Unisex Compression Socks
Polyester/nylon blend (presumed elastic compression textile)
Lower concern; standard compression socks unlikely to require PFAS, but brand discloses nothing.
⚠Risky category by default
Experia
Thorlo Experia X Speed Cushion No Show Tab
Nylon/polyester blend with acrylic padding (no chemical treatment claimed)
Lower concern for typical athletic sock, no water-repellent coating or stain-resist finish disclosed, but no public PFAS data exists.
⚠Risky category by default
Experia
Thorlos Women's Experia Xccu Thin Cushion Running Low Cut Socks
Acrylic, nylon, spandex blend (no waterproofing or stain resistance treatment described)
Lower PFAS concern; standard running sock with no water-repellent finish.
⚠Risky category by default
Experia
Thorlo Experia Crew Socks Gray
Cotton-blend crew socks, no PFAS-prone finishes disclosed
Lower PFAS concern; plain crew socks unlikely to use water-repellent coating or specialty coatings.
⚠Risky category by default
Swiftwick
Swiftwick Socks
Merino wool blend, nylon, elastane
Lower concern for typical athletic socks, no water-repellent coating or stain treatment known to be applied.
⚠Risky category by default
Swiftwick
Aspire Seven Socks
Merino wool blend with nylon
Lower PFAS concern for athletic socks; standard materials unlikely to require water-repellent coating treatment.
⚠Risky category by default
Swiftwick
Maxus One Socks
Merino wool blend (primary); polyester/nylon
Lower PFAS concern, natural fiber blend with no disclosed waterproofing, but brand silent on chemistry.
⚠Risky category by default
Swiftwick
Medium Aspire Mid-Crew Socks 3-Pack
nylon/polyester blend athletic socks
Lower concern for typical athletic socks; no PFAS-prone features identified, but brand offers no transparency.
⚠Risky category by default
Swiftwick
Aspire Mid Crew Socks
Merino wool blend, no stated water-resistant treatment
Lower PFAS concern; merino wool socks typically untreated, but brand silence on any water-repellent coating leaves modest uncertainty.
⚠Risky category by default
Swiftwick
Aspire One Below the Ankle Socks
Merino wool blend, no reported water-repellent coating (water-repellent coating) coating
Lower-concern choice; no known PFAS treatment, but brand transparency on manufacturing is limited.
⚠Risky category by default
Swiftwick
Run Pack 3
Merino wool blend socks
Lower PFAS concern for everyday sock use; no evidence of problematic treatments.
⚠Risky category by default
Swiftwick
Flite XT Mid-Crew Socks
Merino wool blend, synthetic fibers (acrylic/nylon)
Lower PFAS concern for performance socks; no waterproofing or special finishes requiring PFAS treatment.
⚠Risky category by default
Thorlo
s Men's Running Crew 3-Pair Pack
Acrylic blend crew socks (synthetic fibers)
Lower concern, standard athletic socks with no known PFAS triggers, but brand offers no transparency.
⚠Risky category by default
Thorlo
Unisex Maximum Cushion Ankle Running Socks (6-Pack)
Acrylic, cotton, nylon blend with cushioning
Lower PFAS concern; basic athletic sock with no disclosed water/stain treatments.
⚠Risky category by default
Thorlo
s Running Crew
Merino wool blend / synthetic fibers (acrylic/nylon)
Lower concern, basic crew sock with no waterproofing or stain treatment signals, but no public PFAS commitment from brand.
⚠Risky category by default
Thorlo
s Running Rolltop 3-Pair Pack
Acrylic blend textile (no water-resistant coating disclosed)
Lower concern, basic socks with no water-repellent finish, but brand offers no PFAS transparency.
⚠Risky category by default
Thorlo
s Men's TRMX Max Cushion Trail Hiking Ankle Socks (3 Pair Pack
Merino wool blend, synthetic fiber
Lower PFAS concern; no evidence of intentional fluorochemical treatment, but brand discloses nothing.
⚠Risky category by default
Thorlo
s Men's Thorlo Running Mini Crew Socks
Acrylic, nylon, spandex blend (standard athletic socks, no special coatings noted)
Lower PFAS concern, plain athletic socks with no Teflon-family coating or water-repellent coating treatment apparent.
⚠Risky category by default
Thorlo
s Maximum Cushion Rolltop Tennis Socks (3-Pack)
Acrylic blend yarn (cushioned textile)
Lower-concern socks; no known PFAS triggers, but brand silence on treatment limits full assurance.
⚠Risky category by default
Adidas
Terrex Xperior Climacool Trail Crew Socks
synthetic blend with Climacool moisture-wicking treatment
Skip until Adidas discloses water-repellent coating chemistry; moisture-wicking socks often use PFAS-based treatments.
⚠Waterproof or stain-proof treatment
Under Armour
Adult Under Armour ArmourDry Run Cushion 3-Pack Socks
Polyester/nylon blend with ArmourDry moisture-wicking treatment
Lower-concern socks, but water-repellent coating finish invites caution without transparency.
⚠Waterproof or stain-proof treatment
Injinji
Ultra Run Crew
Merino wool blend with moisture-wicking treatment
Lower-concern athletic sock; merino wool reduces PFAS urgency, but water-repellent coating treatment warrant confirmation.
⚠Waterproof or stain-proof treatment
Fox River
Men's Fox River Trail Pack
Merino wool blend with water-repellent coating finish
Skip until brand discloses water-repellent coating chemistry, typical wool socks use PFAS treatments.
⚠Waterproof or stain-proof treatment
Fox River
Alturas Wick Dry
Merino wool blend with Wick Dry moisture-wicking treatment
Lower concern for PFAS, but brand silence on treatment chemistry leaves some uncertainty.
⚠Waterproof or stain-proof treatment
Fox River
Wick Dry Triathlon Lightweight Crew Running Socks
Acrylic/polyester blend with water-repellent coating (water-repellent coating) treatment
water-repellent coating-treated athletic socks pose moderate PFAS concern; brand discloses no treatment details.
⚠Waterproof or stain-proof treatment
Keen
Women's Hiker Micro Crew Midweight with Cushion
merino wool blend, water-repellent coating-treated upper
Moderate PFAS risk due to water-repellent coating treatment; Keen does not disclose details.
⚠Waterproof or stain-proof treatment
ASSOS
Rsr Socks
Merino wool blend with water-repellent coating finish
High-performance cycling socks likely treated with water-repellent coating; ASSOS discloses nothing about PFAS, contact them directly.
⚠Waterproof or stain-proof treatment
ASSOS
Mille Gt Socks
Merino wool blend with water-repellent coating treatment
Skip until ASSOS clarifies water-repellent coating chemistry, standard finishes often contain PFAS.
⚠Waterproof or stain-proof treatment
Get the safe list, free
The products we score each week, and the safest alternative in every category.
No spam. Unsubscribe anytime.