Waterproof Hiking Socks, ranked by PFAS safety
181 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
Smartwool
Men's Mountaineer Classic Edition Maximum Cushion Crew Socks
Merino wool blend (primary natural fiber)
Lower PFAS concern, natural wool fiber with no waterproofing treatment flagged, but Smartwool provides no explicit PFAS disclosure.
⚠Risky category by default
Smartwool
Men's Hike Full Cushion Crew Socks
Merino wool blend (merino wool, nylon, elastane)
Lower PFAS concern; natural fiber socks unlikely to need water-repellent coating treatment, but Smartwool's lack of disclosure leaves room for uncertainty.
⚠Risky category by default
Smartwool
Men's Hike Classic Edition Full Cushion Crew Socks
Merino wool blend (primary fiber); no reported water-repellent coating (water-repellent coating) or stain treatment disclosed
Lower PFAS concern, plain wool socks with no disclosed treatments, but verify fiber content if sourcing matters to you.
⚠Risky category by default
Darn Tough
Men's Spaced Out Micro Crew Lightweight Hiking Socks
Merino wool blend, nylon, spandex
Lower PFAS concern for untreated wool socks, but verify with brand if water-resistance treatment was applied.
⚠Risky category by default
Darn Tough
Men's Hiker Encounter 2-Pack
Merino wool blend, no water-repellent treatment applied
Lower PFAS concern; wool hiking socks without water-repellent coating treatment are a safer choice.
⚠Risky category by default
Darn Tough
Men's Weird and Wild Hiking 2-Pack
merino wool blend, nylon
Lower concern; natural-fiber hiking socks unlikely to require PFAS, but no public disclosure from Darn Tough.
⚠Risky category by default
Bridgedale
Lightweight Boot Socks
Merino wool blend, acrylic, polyamide
Lower concern, natural fiber blend socks with no known water-repellent coating or performance coatings flagged.
⚠Risky category by default
Merrell
Moab Hiker Low Cut Sock
merino wool blend, synthetic fibers
Lower concern for PFAS; standard sock with no waterproof/stain treatment claims.
⚠Risky category by default
Merrell
Premium Wool Trail Low Cut Sock
Merino wool blend, no known water-repellent coating treatment disclosed
Lower concern; wool socks rarely need PFAS finishes, but Merrell's silence on treatment is a gap.
⚠Risky category by default
Merrell
Premium Wool Trail Crew Socks
Merino/premium wool blend, no water-resistant coating mentioned
Lower PFAS concern, wool socks without disclosed water-repellent coating treatment carry minimal traditional risk.
⚠Risky category by default
The North Face
Hiking Crew Socks
Merino wool blend / synthetic fibers (polyester, nylon)
Lower concern, socks are not typical PFAS-application products, but no brand transparency.
⚠Risky category by default
The North Face
Boy's Mountain Hiking Crew Socks
Nylon/polyester blend (typical hiking sock)
Lower concern; standard hiking socks without known water-repellent treatment, PFAS risk unlikely but unconfirmed.
⚠Risky category by default
The North Face
Hiking Quarter Socks
Merino wool blend, nylon, elastane
Lower PFAS concern for basic hiking socks without water-repellent treatment; verify final product specs.
⚠Risky category by default
The North Face
Trail Run Crew Socks
polyester/nylon blend with elastane
Lower-concern product; no PFAS-prone features, but The North Face hasn't disclosed water-repellent coating treatment details.
⚠Risky category by default
The North Face
Multi Sport Crew Socks
Merino wool blend, nylon, elastane
Lower concern, basic athletic socks with no known water treatment; verify fiber sourcing if PFAS-sensitive.
⚠Risky category by default
The North Face
Everyday Crew Sock Logo 2-Pack
Cotton blend socks, no reported special coatings
Lower PFAS concern; basic cotton socks unlikely to contain intentional PFAS, but The North Face has not disclosed supplier practices.
⚠Risky category by default
The North Face
Men's Alpine High Socks
Merino wool blend, nylon, elastane
Lower concern; no PFAS-prone features typical of socks, but no brand disclosure on treatments.
⚠Risky category by default
Columbia
s Hiking Medium Weight Crew Socks
Merino wool blend (primary); no reported water-repellent coating
Lower-concern choice for socks; wool blends rarely treated with PFAS, but Columbia does not publicly disclose.
⚠Risky category by default
Columbia
Men's Balance Point Low-Cut Walking Socks
Merino wool blend (primary); standard elastic/synthetic cuff
Lower PFAS concern; basic wool socks with no obvious water-repellent coating or stain treatment triggers.
⚠Risky category by default
Columbia
Men's Hike Crew Socks (2 Pack)
Nylon/polyester blend with acrylic
Lower PFAS concern for untreated athletic socks; no waterproofing or stain treatment disclosed.
⚠Risky category by default
Columbia
Women's Active Hike No Show Socks (2 Pack)
Polyester/nylon blend, no reported water-resistant coating
Lower PFAS concern; basic athletic socks with no water-repellent treatment.
⚠Risky category by default
Columbia
Men's 4 Pack Moisture Control Crew Socks
polyester/nylon blend with moisture-control fiber
Lower concern; typical crew socks unlikely to need PFAS treatments, but Columbia doesn't publicly disclose.
⚠Risky category by default
Columbia
Men's Balance Point Crew Socks 3-Pack
Cotton/polyester blend socks, no reported treatment
Lower-concern basic socks; no PFAS-prone features, but Columbia makes no public PFAS commitment.
⚠Risky category by default
Columbia
Moisture Control Ribbed Crew Socks (4 Pack)
Polyester blend with moisture-wicking treatment (unspecified)
Lower concern, but moisture-control finish is unspecified, Columbia has not disclosed PFAS-free status.
⚠Risky category by default
Columbia
Space Dye Brrr No-Show Lightweight Socks (2 Pack)
Nylon and polyester blend (synthetic fibers)
Lower PFAS concern for basic no-show socks; no waterproofing or water-repellent coating treatment typical.
⚠Risky category by default
Keen
Kenetrek Men's Sonora Lightweight Hiker Socks
merino wool blend, nylon
Lower PFAS concern; Keen has not disclosed water-repellent coating treatments but standard hiking socks rarely require fluorinated water resistance.
⚠Risky category by default
Keen
Keen Socks
Cotton/synthetic fiber blend, no waterproof or stain-resistant coating disclosed
Lower concern, basic socks with no chemical treatments identified.
⚠Risky category by default
Keen
Kenetrek Canyon Lightweight Boot Height Socks
Merino wool blend (primary); elastic/synthetic blend cuff
Lower concern for typical wool socks, but synthetic elastic blends and undisclosed finishes introduce minor uncertainty.
⚠Risky category by default
Salomon
X Ultra Access Crew Socks 2 Pairs
Merino wool blend with synthetic fibers (polyamide/nylon, polyester)
Lower concern; typical crew socks with no known PFAS-treatment triggers, but check care label for undisclosed finishes.
⚠Risky category by default
Salomon
Sports Socks Salomon X Ultra Quarter Foot Size
Polyester/nylon blend with elastane
Lower concern; standard sports sock with no known PFAS triggers, but no brand transparency on treatments.
⚠Risky category by default
Salomon
Socks X Pro
Merino wool blend, synthetic fibers (likely polyester/nylon)
Lower PFAS concern; athletic socks without water-resistant treatment typically avoid PFAS, but Salomon remains silent on specifics.
⚠Risky category by default
Wrangler
Men's Ultra Dry Crew Socks (6-Pack)
Cotton-blend athletic socks, no stated water-repellent coating or advanced coating
Lower PFAS concern, basic cotton socks unlikely to use fluorinated finishes, but no brand transparency.
⚠Risky category by default
Wrangler
Men's Wellington Boot Socks
Cotton blend socks, no special coating disclosed
Lower concern, plain socks with no water-repellent coating or stain treatment disclosed.
⚠Risky category by default
Wrangler
Men's Warmest Boot Socks (4 Pack)
Cotton-blend knit textile, no stated water-resistant treatment
Lower concern, plain boot socks with no water-repellent coating or stain-resistant finish.
⚠Risky category by default
Wrangler
Men's Riggs Steel Toe Cotton Crew Socks (2 Pair Pack)
100% cotton crew socks with steel-toe reinforcement
Lower PFAS concern; basic cotton socks with no water-repellent coating or stain treatments flagged.
⚠Risky category by default
Wigwam
Merino Trek Hiker Lightweight Crew Socks
Merino wool blend (primary); standard construction
Lower concern; plain merino socks with no water-repellent finish, but brand offers no PFAS transparency.
⚠Risky category by default
Wigwam
Hiking Outdoor Midweight Crew Socks
Acrylic blend or merino wool mix (typical Wigwam hiking sock composition); no water-repellent coating (water-repellent coating) treatment di
Lower-concern choice; wool/acrylic socks without marketed water treatment sidestep most PFAS pathways.
⚠Risky category by default
Wigwam
Cool Lite Hiker Pro Crew Socks
Merino wool blend, nylon, elastane
Lower-concern socks; natural fiber base with no known water-repellent coating or performance coatings typical of PFAS risk.
⚠Risky category by default
Wigwam
Cl2 Hiker Pro Low Socks
Merino wool blend, no specified water treatment
Lower-concern choice; Wigwam discloses no PFAS treatment, and Merino wool socks rarely require water-repellent coating coatings.
⚠Risky category by default
Wigwam
Cool-Lite Hiker Crew Socks - undefined
Acrylic/wool blend or synthetic blend fabric (typical for Wigwam hikers)
Lower concern, no water treatment disclosed, but standard hiking socks unlikely to require PFAS water-repellent coating.
⚠Risky category by default
Thorlo
s Men's KX Max Cushion Hiking Crew Socks
Merino wool blend, polyester, nylon, elastane
Lower PFAS concern; standard hiking sock with no known water-resistant treatment.
⚠Risky category by default
Thorlo
Boy Scout Thorlos Low Cut Hiking Socks
Acrylic, nylon, polyester blend (standard athletic sock fibers)
Lower PFAS concern, standard sock construction unlikely to require PFAS, but brand makes no explicit commitment.
⚠Risky category by default
Thorlo
s Men's Hiking Crew Socks
merino wool blend, acrylic, nylon (standard textile)
Lower-concern baseline; standard hiking socks with no known PFAS triggers, though no explicit commitment from brand.
⚠Risky category by default
Thorlo
s Thorlo Men's Light Hiking Crew Socks
Merino wool blend, nylon, polyester
Lower PFAS concern; standard hiking sock with no waterproofing or water-repellent coating treatment.
⚠Risky category by default
Thorlo
s Walking Crew 3-Pair Pack
Merino wool blend, acrylic, nylon
Lower concern; traditional sock materials with no known PFAS triggers, but brand silence limits assurance.
⚠Risky category by default
Thorlo
s Ultra-Light Hiking Crew Socks Men's
Acrylic blend (nylon/acrylic/polyester) with cushioning
Lower PFAS concern for standard hiking socks, no water-repellent treatment typical in this category.
⚠Risky category by default
Thorlo
s Men's Light Hiker Crew 3-Pair Pack
Merino wool blend, acrylic, nylon, polyester
Lower concern; conventional sock without water-repellent marketing, but no brand transparency on PFAS.
⚠Risky category by default
Thorlo
Men's Moderate Cushion Ankle Hiking Socks
Merino wool blend (primary); synthetic blend cushioning
Lower concern, natural fiber blend without water repellency claims typical of hiking socks.
⚠Risky category by default
Patagonia
Yulex Wading Socks
Yulex (synthetic rubber) with Polyester blend
Lower-concern choice, Patagonia explicitly avoids PFOA/Teflon-type coating in Yulex socks.
⚠Waterproof or stain-proof treatment
Patagonia
Winter Weight Fleece Oversocks
Merino wool blend, no water-repellent coating treatment specified
Lower concern, natural fiber base with no disclosed water treatments.
⚠Risky category by default
Patagonia
Merino Wool Blend Crew Sock - SMALL
Merino wool blend (primary fibers)
Lower concern; natural fiber blend with no known water-repellent treatment, but verify care label for water-repellent coating coatings.
⚠Risky category by default
Icebreaker
Men's Hike Medium Crew Socks
Merino wool blend (no water-repellent finish claimed)
Lower-concern choice; Icebreaker merino socks use untreated fibers without water-repellent coating.
⚠Risky category by default
Icebreaker
Women's Hike Medium Crew Socks
Merino wool blend (wool/nylon/elastane)
Lower PFAS concern for basic merino hiking socks unless water-repellent coating treatment applied, check product spec sheet.
⚠Risky category by default
Icebreaker
Men's Hike+ Light Crew Socks
Merino wool blend with nylon
Lower concern for PFAS; natural fiber base limits likelihood, but nylon content and lack of brand transparency create modest uncertainty.
⚠Risky category by default
Icebreaker
Men's Lifestyle Ultra Light Crew Socks
Merino wool blend (primary); no documented water-repellent or stain treatment disclosed
Lower-concern socks; untreated wool blends typically avoid PFAS, but brand silence limits certainty.
⚠Risky category by default
Icebreaker
Men's Hiking Socks - Various Styles & Colors - Odor
Merino wool blend (primary fiber)
Lower concern, natural fiber base, but Icebreaker doesn't disclose water-repellent coating treatment details.
⚠Risky category by default
Icebreaker
Men's Hike Cool-Lite 3/4 Crew Socks
Merino wool blend with nylon
Lower PFAS concern for merino socks, but brand offers no transparency on dyes or finishes.
⚠Risky category by default
Icebreaker
Men's Hike+ Heavy Crew Socks
Merino wool blend (primary); elastic/synthetic reinforcement in arch/toe
Lower PFAS concern for a basic wool hiking sock; no water-repellent coating or stain treatment claimed.
⚠Risky category by default
REI Co-op
COOLMAX EcoMade Midweight Hiking Socks
COOLMAX polyester blend (synthetic fiber, no Teflon-family coating disclosed)
Lower PFAS concern; standard synthetic socks with no water-repellent finish disclosed.
⚠Risky category by default
REI Co-op
COOLMAX EcoMade Lightweight Hiking Socks
COOLMAX polyester blend, no chemical water treatment claimed
Lower PFAS concern; conventional blend socks without water-repellent coating typical of REI's eco-focused lines.
⚠Risky category by default
REI Co-op
COOLMAX EcoMade Lightweight Hiking Crew Socks (2 Pair
COOLMAX polyester blend (synthetic fiber, no topical water-repellent coating treatment identified)
Lower-concern socks; synthetic fiber with no known waterproof/stain treatment, but PFAS use in polyester production not disclosed.
⚠Risky category by default
REI Co-op
Merino Wool Lightweight Hiking Socks
Merino wool blend (primary fiber)
Lower concern; merino wool has minimal PFAS risk, but REI doesn't disclose water-repellent coating treatment details.
⚠Risky category by default
REI Co-op
COOLMAX EcoMade Lightweight Hiking Quarter Socks (2 Pairs
Merino wool blend, COOLMAX polyester, no water-repellent coating specified
Lower concern, conventional hiking sock with no water-repellent coating treatment or known PFAS coatings, but brand makes no explicit disclosure.
⚠Risky category by default
REI Co-op
Merino Wool Lightweight Hiking Socks (2 Pairs)
Merino wool blend (no water-resistant treatment disclosed)
Lower PFAS concern, plain merino wool, though no PFAS disclosure standard applies to REI Co-op.
⚠Risky category by default
Balega
Hike Quarter Socks
Merino wool blend with synthetic fibers (acrylic, polyamide, elastane)
Lower concern; traditional sock materials with no known PFAS-typical treatments, but Balega provides no public PFAS transparency.
⚠Risky category by default
Balega
Enduro Quarter Socks
Merino wool blend, acrylic, nylon, elastane
Lower PFAS concern; natural-fiber athletic sock with no known water-repellent treatment.
⚠Risky category by default
Balega
Blister Resist Crew Socks
Nylon/synthetic blend, blister-resistant cushioning
Lower PFAS concern; conventional athletic socks without waterproofing or advanced coatings.
⚠Risky category by default
Balega
Enduro Re-Engineered No Show Tab
Nylon, acrylic, elastane blend (standard athletic sock fibers)
Lower PFAS concern likely; basic athletic sock without water treatment, but brand disclosure absent.
⚠Risky category by default
Balega
Blister Resist Light Mini Crew Socks
Nylon/polyester blend with elastane (standard athletic sock fibers)
Lower concern unless blister-resist coating is undisclosed; standard sock construction suggests no PFAS need.
⚠Risky category by default
Injinji
Outdoor Midweight Crew
Merino wool blend (primary); nylon reinforcement
Lower concern; merino-nylon blend socks with no known water-repellent coating treatment or public PFAS disclosures.
⚠Risky category by default
Injinji
Snow Over The Calf Socks
Merino wool blend (primary); no known water-repellent treatment disclosed
Lower concern; natural fiber blend with no disclosed water-repellent coating, but brand transparency on treatments is absent.
⚠Risky category by default
Injinji
Liner Crew
Nylon and polyester blend (synthetic fiber)
Lower-concern choice; synthetic base fibers carry no known PFAS risk, but brand offers no transparency.
⚠Risky category by default
Injinji
Trail Midweight Over the Calf Running Socks
Merino wool blend, nylon, elastane (no special water-resistant or stain-resistant finish noted)
Lower PFAS concern; natural fiber blend with no disclosed durable water-resistant treatment.
⚠Risky category by default
Injinji
Spectrum Trail Midweight Gummy Bear Toesocks
Merino wool blend (primary fiber); elastane/nylon support
Lower-concern base materials, but no PFAS transparency from brand, typical for socks.
⚠Risky category by default
Injinji
Men's Liner + Hiker Crew
Merino wool blend, synthetic fibers (nylon/polyester base)
Lower-concern socks; no waterproofing or special coatings typical of PFAS risk.
⚠Risky category by default
Drymax
Copper Lite Crew Cut Socks
Merino wool blend with copper nanoparticles
Lower-concern choice; natural fiber base with no known PFAS treatment, but brand provides no explicit disclosure.
⚠Risky category by default
Drymax
Danner Men's Hot Weather TFX Drymax Crew Socks
Acrylic, nylon, polyester blend; moisture-wicking fibers
Lower concern; no evidence of PFAS treatment in standard performance socks.
⚠Risky category by default
Drymax
Copper Lite Over Calf Socks
Acrylic/nylon blend with copper-infused fibers
Lower-concern option; no water-repellent coating treatment typical in athletic socks, but brand transparency on treatments is absent.
⚠Risky category by default
Fox River
Men's Fox RIVER Maquoketa Medium Weight Crew Hiking Sock
wool blend (primary fiber, no specialized coating disclosed)
Lower-concern choice; traditional wool hiking sock with no known PFAS-prone treatments.
⚠Risky category by default
Goodhew
Goldtoe Men's Hiker Cushion Quarter Socks (6-Pack)
Cotton/polyester blend with cushioning (likely polyester foam)
Lower PFAS concern, basic socks with no water-resistant or stain-resistant treatment typical of hiking cushion socks.
⚠Risky category by default
Goodhew
Men's Big Easy Crew Socks
merino wool blend, standard knit sock
Lower-concern casual socks; no evidence of PFAS-prone treatments, but brand offers no transparency.
⚠Risky category by default
Woof Wear
Bamboo Long Riding Socks
Bamboo fiber blend (primary)
Lower PFAS concern, natural fiber base, no obvious finish triggers, but brand transparency is absent.
⚠Risky category by default
Woof Wear
Bamboo Short Sock
bamboo fiber blend with elastane/spandex
Lower concern due to bamboo base, but no PFAS disclosure from brand, typical for basic socks.
⚠Risky category by default
Stance
STRIPED IT HIKE CREW SOCK
Cotton/nylon blend, no water-repellent coating disclosed
Lower concern; natural fiber base with no disclosed water treatment.
⚠Risky category by default
Stance
Peaking Hike Mens Crew Socks
Cotton blend crew socks
Lower concern, basic socks with no waterproofing or special coatings that typically trigger PFAS use.
⚠Risky category by default
Stance
ROCKFORD HIKE CREW Socks
Cotton blend crew socks, no specialty coating reported
Lower concern; basic cotton blend crew socks with no reported water-repellent or stain-resistant treatment.
⚠Risky category by default
Stance
Men's Speed Mid Poly Snow Socks (2-Pack)
Polyester/nylon blend (no special coating disclosed)
Lower concern; standard socks with no disclosed water-resistant coating.
⚠Risky category by default
Stance
All Terrain Mid Wool Snow Socks
Merino wool blend with nylon/synthetic reinforcement
Lower concern, wool socks need no water-resistant coating, but brand transparency on synthetics would help.
⚠Risky category by default
Stance
Blend In Hike Crew Socks
Cotton blend, no water-resistant treatment specified
Lower concern, basic crew socks with no reported water-resistant coating.
⚠Risky category by default
Stance
Out of Range Hike Crew Socks
Cotton blend (primary material, no Teflon-family coating treatment known)
Lower concern; basic crew socks without water-repellent coating or stain-resistant claims.
⚠Risky category by default
FITS
Original Full CUSION Merino Wool Hiker Crew Socks
Merino wool blend (primary fiber)
Lower concern, merino wool socks carry minimal PFAS risk unless treated with water-resistant finishes not disclosed.
⚠Risky category by default
FITS
Original Fit Crew Socks
Cotton/cotton blend knit fabric
Lower-concern baseline sock; no known PFAS triggers, but brand makes no disclosure.
⚠Risky category by default
FITS
Rugged Max Cushion Merino Wool Boot Socks
Merino wool blend (primary fiber)
Lower PFAS concern; natural fiber base with no disclosed treatments, though brand transparency is absent.
⚠Risky category by default
Sockwell
Men's Trail Blazer Moderate Compression Socks
Merino wool blend, elastic/synthetic fibers
Lower PFAS concern; standard compression socks without water-repellent finish.
⚠Risky category by default
Sockwell
Men's Sockwell Montrose II
merino wool blend, cotton/synthetic sock fibers
Lower concern for basic sock; merino/cotton blends rarely treated with PFAS, but brand transparency is absent.
⚠Risky category by default
Sockwell
Women's Ascend II Quarter Moderate Compression Socks
nylon/polyamide blend with spandex, likely untreated
Lower PFAS concern; conventional compression sock with no known treatment triggers.
⚠Risky category by default
Sockwell
Men's Ascend II Quarter Moderate Compression Socks
Merino wool blend, nylon, spandex
Lower-concern baseline socks with no known PFAS application; brand silence on chemicals limits certainty.
⚠Risky category by default
Sockwell
Women's Journey Quarter Moderate Compression Socks
Nylon, spandex, merino wool blend
Lower PFAS concern; typical compression sock with no known fluorochemical treatment, but brand offers no disclosure.
⚠Risky category by default
Sockwell
Men's Sockwell Trout
merino wool blend, cotton, nylon
Lower concern for standard socks; no PFAS triggers detected, though Sockwell does not publicly disclose treatment protocols.
⚠Risky category by default
Sockwell
Men's Ranger Essential Comfort Socks
Merino wool blend, elastic, nylon
Lower concern, natural fiber socks with no known PFAS-triggering treatments, though brand makes no explicit disclosure.
⚠Risky category by default
Sockwell
Women's Walk About Crew Moderate Compression Socks
Merino wool blend, nylon, spandex
Lower concern; natural fiber socks with no known water-repellent coating treatment trigger.
⚠Risky category by default
Falke
Men's TK1 Adventure Wool Trekking Socks
Merino wool blend (primary); no water-repellent treatment disclosed
Lower PFAS concern; wool socks rarely treated, but Falke's silence on water-repellent coating compounds leaves modest uncertainty.
⚠Risky category by default
Falke
TK2 Socks Men's
Merino wool blend, polyamide, elastane
Lower PFAS concern, wool-blend socks with no performance coatings typically require no fluorinated finishes.
⚠Risky category by default
Falke
TK2 Men Socks
merino wool blend, polyamide, elastane
Lower-concern baseline; premium socks without known PFAS triggers, but brand provides no transparency.
⚠Risky category by default
Falke
Men's TK-X Expedition Wool Trekking Socks
Merino wool blend (primary); no reported water-repellent treatment disclosed
Lower-concern option, untreated wool trekking socks with no disclosed water-repellent coating or water-resistant finish.
⚠Risky category by default
Falke
Trekking TK2 Cool Socks Men's
Merino wool blend, synthetic fibers (polyamide, polypropylene)
Lower PFAS concern; merino-dominant socks with no known water-repellent coating, but brand silent on material details.
⚠Risky category by default
Point6
Hiking Essential Medium Cushion 1/4 Crew Socks
Merino wool blend (primary); standard yarn dyes and finishes
Lower concern, wool socks rarely need PFAS treatments, but Point6 discloses nothing about their dyeing or finishing processes.
⚠Risky category by default
Point6
Hiking Essential Extra Light Mini Crew
Merino wool blend (merino wool/nylon/spandex)
Lower-concern choice; merino wool blends rarely require PFAS treatments, but brand silence leaves room for doubt.
⚠Risky category by default
Point6
37.5 Light Mini Crew Hiking Socks
Merino wool blend (primary); no reported water-repellent coating treatment
Lower PFAS concern for untreated merino hiking socks; no waterproofing triggers.
⚠Risky category by default
Point6
Hiking Peak Light Crew Socks
merino wool blend, synthetic fibers
Lower PFAS concern for basic hiking socks, but brand offers no transparency.
⚠Risky category by default
Point6
Arctic Heavy Cushion Over-the-Calf Socks
Merino wool blend (primary); construction details unspecified
Lower PFAS concern; wool socks unlikely to require PFAS finishes, but no third-party verification available.
⚠Risky category by default
Allbirds
Trino Hiders
Merino wool blend, natural fibers
Lower concern, natural fiber base, but no PFAS transparency from brand.
⚠Risky category by default
Allbirds
Anytime No Show Sock Rugged Beige L
Merino wool blend (primary); minimal synthetic reinforcement
Lower concern, natural fiber sock with no known water/stain treatment, but Allbirds has not publicly disclosed PFAS testing.
⚠Risky category by default
Allbirds
Trino Sprinters Cushioned
Sugarcane-based foam, recycled polyester, knitted textile upper
Lower PFAS concern for the core shoe, but Allbirds has not publicly disclosed water-resistance treatment details.
⚠Risky category by default
Allbirds
Unisex Lightweight Anytime No Show Heel Grip Sock Dh3 Grey
Merino wool blend with synthetic fibers (polyamide/nylon)
Lower PFAS concern for a basic wool-blend sock, but Allbirds provides no transparency on water-repellent coating treatments.
⚠Risky category by default
Bombas
Men's Colorblock Stripe Hiking Socks
Cotton-nylon blend; no water-repellent coating disclosed
Lower PFAS concern; basic hiking socks with no disclosed water-repellent coating treatment.
⚠Risky category by default
Bombas
Women's Hiking Performance Calf Socks
Merino wool blend with nylon/synthetic fibers, no water-repellent finish disclosed
Lower-concern choice, natural-fiber socks without disclosed water-repellent coating treatment, but brand transparency on PFAS is absent.
⚠Risky category by default
Bombas
Men's Cotton Blend Quarter Socks
Cotton blend (primary fibers, no water-repellent coating finish reported)
Lower PFAS concern for a basic cotton-blend sock without water-repellent treatment.
⚠Risky category by default
Bombas
Women's Bombas Merino Wool Blend Hiking Performance Calf Sock
merino wool blend (no water repellent coating disclosed)
Lower concern; plain merino blend with no disclosed treatments, but Bombas has not publicly committed to PFAS-free standards.
⚠Risky category by default
Bombas
Men's Bombas Hiking Performance Merino Wool Blend Calf Socks
Merino wool blend (primary natural fiber)
Lower concern, wool-dominant socks typically avoid water-repellent coating treatments; no public PFAS flags.
⚠Risky category by default
Bombas
Women's Cotton Blend Quarter Socks
cotton blend (cotton primary, synthetic blend unspecified)
Lower concern; no known PFAS triggers, but blend composition opaque.
⚠Risky category by default
Bombas
Women's Hiking Performance Calf Socks - Botanic Purple - Medium - Cotton Blend - Bombas
Cotton blend (primary material, no water-repellent coating or specialty coating disclosed)
Lower PFAS concern, basic cotton-blend socks with no chemical treatment disclosed, but brand makes no affirmative PFAS statement.
⚠Risky category by default
Patagonia
Yulex Wading Socks with Gravel Guard
Yulex (natural rubber alternative) with synthetic water-repellent coating treatment
Lower-concern wading sock; Patagonia claims non-fluorinated water-repellent coating, but no independent verification of absence.
⚠Waterproof or stain-proof treatment
Bridgedale
Men's StormSock Waterproof Heavyweight Boot Socks
Merino wool blend with water-repellent coating (water-repellent coating) finish
Typical waterproof sock, waterproofing likely contains PFAS, but no public disclosure or testing available.
⚠Waterproof or stain-proof treatment
Bridgedale
StormSock Midweight Knee
Wool blend with water-repellent coating finish
Lower-concern choice, but Bridgedale's water-repellent coating treatment remains undisclosed, contact brand for specifics.
⚠Waterproof or stain-proof treatment
Merrell
Moab Hiker Crew Hiking Socks
Merino wool/synthetic blend with water-repellent coating treatment
Lower concern for most wearers, but water-repellent coating treatment chemicals unspecified, typical for socks but worth noting if you avoid PFAS.
⚠Waterproof or stain-proof treatment
Merrell
Moab Hiking Quarter Socks
merino wool blend with water-repellent coating treatment (likely fluorocarbon-based)
Skip until Merrell discloses water-repellent coating chemistry or commits to PFAS-free options.
⚠Waterproof or stain-proof treatment
The North Face
Trail Run Quarter Socks
Merino wool blend with water-repellent coating finish
Skip until The North Face discloses or eliminates water-repellent coating treatment.
⚠Waterproof or stain-proof treatment
Keen
Ken's Unisex Waterproof Breathable Socks
Merino wool blend with water-repellent coating (water-repellent coating) finish
Skip until Keen discloses water-repellent coating chemistry or commits to PFAS-free.
⚠Waterproof or stain-proof treatment
Salomon
X Ultra Socks
Merino wool blend with water-repellent coating treatment
Lower-concern baseline, but Salomon does not disclose water-repellent coating chemistry, skip if PFAS avoidance is a priority.
⚠Waterproof or stain-proof treatment
Salomon
QST Socks Deep Lagoon/Shocking Orange
Merino wool blend with water-repellent coating finish
Skip until Salomon discloses water-repellent coating chemistry or verify direct with brand.
⚠Waterproof or stain-proof treatment
Salomon
XA Forces Crew Socks | Coyote Brown / XL
Merino wool blend with water-repellent coating treatment
Skip until Salomon discloses water-repellent coating chemistry or switches to PFAS-free alternatives.
⚠Waterproof or stain-proof treatment
Salomon
XA Forces Crew Socks
Synthetic blend with moisture-wicking treatment (likely water-repellent coating finish)
Skip until Salomon discloses water-repellent coating chemistry or provides third-party verification.
⚠Waterproof or stain-proof treatment
Salomon
S/Race Knee High Elastic Ski Socks
Merino wool blend with elastane; water-repellent coating-treated synthetic
Moderate PFAS risk due to likely water-repellent coating treatment; Salomon has not disclosed or committed to PFAS-free standards.
⚠Waterproof or stain-proof treatment
Wrangler
Men's Ultra Dry P12 Crew Socks (12 Pack)
Cotton blend with moisture-wicking treatment (likely water-repellent coating)
Moderate concern: moisture-wicking socks commonly use water-repellent coating coatings that may contain PFAS; no brand transparency available.
⚠Waterproof or stain-proof treatment
Wrangler
Men's Ultra Dri USA Tall Boot Socks
Cotton-blend fabric with water-repellent coating (water-repellent coating) treatment
Skip or request PFAS-free confirmation; water-repellent coating socks often contain PFAS but Wrangler discloses nothing.
⚠Waterproof or stain-proof treatment
Wrangler
Men's Lightweight Ultra-Dri Over the Calf Boot Socks (3 Pack)
Cotton blend with water-repellent coating (water-repellent coating) finish
Moderate concern: water-repellent coating-treated socks likely contain legacy or fluorine-based water repellent; no brand transparency.
⚠Waterproof or stain-proof treatment
Wrangler
Men's Ultra-Dri Work Socks
Cotton/polyester blend with moisture-wicking treatment (water-repellent coating)
Lower concern, but no PFAS transparency; moisture-wicking adds uncertainty.
⚠Waterproof or stain-proof treatment
Wigwam
CL2 Hiker Pro Crew
merino wool blend with water-repellent coating finish
Lower concern than synthetic alternatives, but water-repellent coating treatment source unclear, contact Wigwam for transparency.
⚠Waterproof or stain-proof treatment
Wigwam
Snow Shield Sock
Wool blend with water-repellent treatment (composition unspecified by brand)
Moderate caution: wool-based socks likely lower PFAS risk, but water-repellent coating treatment is unspecified.
⚠Waterproof or stain-proof treatment
Wigwam
Hiking Outdoor Pro
Merino wool blend with water-repellent coating (water-repellent coating) treatment
Skip until Wigwam discloses water-repellent coating chemistry, hiking socks need water resistance, but treatment type is unknown.
⚠Waterproof or stain-proof treatment
REI Co-op
Showers Pass Men's Crosspoint Waterproof Mountain Sock
Merino wool blend with water-repellent coating waterproof coating (type unspecified)
Skip unless REI/Showers Pass discloses water-repellent coating chemistry, waterproof socks carry moderate PFAS concern.
⚠Waterproof or stain-proof treatment
REI Co-op
Midweight Powderbound Snow Socks (2 Pairs)
Merino wool blend with water-repellent finish
Mid-risk: wool socks with water-repellent coating, but REI provides no PFAS transparency, contact them to know.
⚠Waterproof or stain-proof treatment
Balega
Hidden Dry
Merino wool blend with moisture-wicking water-repellent coating treatment
Skip until brand discloses water-repellent coating chemistry or switches to PFAS-free water repellent.
⚠Waterproof or stain-proof treatment
Balega
Hidden Dry Mini Crew Socks
Merino wool blend with synthetic fibers; moisture-wicking water-repellent coating treatment unspecified
Lower concern, but water-repellent coating source unclear, ask Balega directly if PFAS-free matters to you.
⚠Waterproof or stain-proof treatment
Injinji
Snow Crew
Merino wool blend with water-repellent coating (water-repellent coating) treatment
Skip until Injinji discloses water-repellent coating chemistry or switches to PFAS-free treatment.
⚠Waterproof or stain-proof treatment
Drymax
CTR Sock
Acrylic fiber blend with moisture-wicking treatment
Skip until brand discloses water-repellent coating chemistry, moisture-wicking socks often use PFAS-based water repellents.
⚠Waterproof or stain-proof treatment
Drymax
Lite Hiking Crew Socks
Acrylic-blend yarn with moisture-wicking treatment
Moderate uncertainty, durable hiking socks likely use water-repellent coating finishing, but Drymax discloses nothing about PFAS content.
⚠Waterproof or stain-proof treatment
Drymax
Active Duty Crew Socks
Acrylic/polyester blend with moisture-wicking treatment
Lower concern but unconfirmed, no PFAS claims made, moisture-wicking suggests possible water-repellent coating treatment.
⚠Waterproof or stain-proof treatment
Drymax
Danner TFX Hot Weather Drymax Over-Calf Socks
Acrylic blend with moisture-wicking treatment (Drymax technology)
Skip until Drymax discloses or certifies water-repellent coating treatment chemistry.
⚠Waterproof or stain-proof treatment
Drymax
LaCrosse Navigator Drymax Sock Crew
Merino wool blend with moisture-wicking treatment (Drymax proprietary)
Lower concern, but Drymax's moisture tech remains undisclosed, contact brand for specifics.
⚠Waterproof or stain-proof treatment
Fox River
Men's Wick Dry Tramper Crew Socks
Merino wool blend with moisture-wicking treatment (water-repellent coating likely)
Lower confidence. No PFAS claim, likely water-repellent coating-treated, standard risk for outdoor socks.
⚠Waterproof or stain-proof treatment
Fox River
Men's Wick Dry Outlander
Merino wool blend with Wick Dry moisture-wicking treatment
Lower PFAS concern, but Fox River doesn't disclose water-repellent coating chemistry, merino base mitigates risk.
⚠Waterproof or stain-proof treatment
Fox River
Trailhead Crew
Merino wool blend with water-repellent coating finish
Lower PFAS risk than synthetic outerwear, but water-repellent coating treatment unspecified, contact brand for clarity.
⚠Waterproof or stain-proof treatment
Fox River
Men's Trailmaster Crew
Merino wool blend with water-repellent coating finish
Crew socks with standard water-repellent coating treatment, lower concern but brand discloses nothing about PFAS alternatives.
⚠Waterproof or stain-proof treatment
Fox River
Men's Wick Dry Outlander Heavyweight Socks (2-Pack)
Merino wool blend with Wick Dry moisture-wicking treatment
Skip unless Fox River discloses Wick Dry treatment chemistry, water-repellent coating coatings commonly contain PFAS.
⚠Waterproof or stain-proof treatment
Goodhew
Frogg Toggs Men's Waterproof Socks
Merino wool blend with water-repellent coating (water-repellent) treatment
Lower concern but opaque, waterproof socks likely use water-repellent coating treatment; brand provides no PFAS clarity.
⚠Waterproof or stain-proof treatment
Goodhew
DexShell Trekking Waterproof Socks
Merino wool blend with DexShell waterproof membrane coating
Skip until brand discloses waterproof coating chemistry; DexShell's proprietary membrane raises unresolved PFAS concern.
⚠Waterproof or stain-proof treatment
Goodhew
Pike Trail Waterproof Breathable Socks
Merino wool blend with water-repellent coating (water-repellent coating) finish
Skip until brand discloses water-repellent coating chemistry; waterproof textiles commonly use PFAS-based treatments.
⚠Waterproof or stain-proof treatment
Goodhew
Showers Pass Men's Crosspoint Waterproof Mountain Sock
Merino wool blend with water-repellent coating (type unspecified)
Skip until Showers Pass discloses water-repellent coating chemistry or switches to PFAS-free treatment.
⚠Waterproof or stain-proof treatment
Goodhew
Gmogad Mid-Calf Waterproof Breathable Hiking Socks
Merino wool blend with water-repellent coating (water-repellent coating) treatment
Mid-range risk: waterproof hiking socks often use water-repellent coating treatments that may contain PFAS, but Goodhew provides no transparency.
⚠Waterproof or stain-proof treatment
Goodhew
Norwich Waterproof Cold Weather Mid Lightweight Hiking Socks - Olive
Merino wool blend with water-repellent coating treatment
Lower-concern choice, but water-repellent coating source unknown, ask Goodhew directly before buying.
⚠Waterproof or stain-proof treatment
Woof Wear
Wrap ME Waterproof Merino Wool Hiking Socks
Merino wool with waterproof treatment (water-repellent coating)
Merino wool is lower-concern; waterproof treatment source unknown, skip unless brand confirms PFAS-free water-repellent coating.
⚠Waterproof or stain-proof treatment
Woof Wear
Showers Pass Men's Crosspoint Waterproof Mountain Sock
Merino wool blend with water-repellent coating (water-repellent coating) treatment
Skip until Showers Pass discloses water-repellent coating chemistry or switches to PFAS-free water repellency.
⚠Waterproof or stain-proof treatment
Woof Wear
Long Winter Tech Riding Sock
Merino wool blend with water-repellent coating finish
Lower concern for PFAS, but water-repellent coating treatment source unknown, contact Woof Wear for specifics.
⚠Waterproof or stain-proof treatment
Woof Wear
Winter Riding Sock
Merino wool blend with water-repellent coating treatment
Skip until brand discloses water-repellent coating chemistry or switches to PFAS-free water repellent.
⚠Waterproof or stain-proof treatment
Woof Wear
Wudu Waterproof Socks
Unknown waterproof coating/treatment on textile base
Skip until the brand discloses waterproof treatment chemistry.
⚠Waterproof or stain-proof treatment
Woof Wear
Competition Riding Socks
Merino wool blend with moisture-wicking treatment
Skip until brand discloses water-repellent coating chemistry, wool socks don't need PFAS but many do.
⚠Waterproof or stain-proof treatment
Stance
Huntin Mid Poly Snow
Polyester blend with water-repellent coating treatment
Skip or contact Stance for water-repellent coating ingredient transparency before buying.
⚠Waterproof or stain-proof treatment
FITS
Frogg Toggs Waterproof Crew Socks
Polyester microfiber with water-repellent coating (water-repellent coating) treatment
Skip unless brand discloses water-repellent coating chemistry, waterproof socks commonly use PFAS.
⚠Waterproof or stain-proof treatment
FITS
Showers Pass Men's Crosspoint Waterproof Mountain Sock
Merino wool blend with water-repellent coating (water-repellent coating) treatment
Waterproof socks carry inherent PFAS risk; no brand disclosure means lower confidence in safety.
⚠Waterproof or stain-proof treatment
FITS
Mid-Calf Waterproof Breathable Hiking Socks
Merino wool blend with water-repellent coating (water-repellent coating) finish
Skip until FITS discloses water-repellent coating chemistry or pursue verified PFAS-free hiking socks.
⚠Waterproof or stain-proof treatment
FITS
NRS HydroSkin 0.5 Wetsocks
Neoprene or synthetic rubber base with water-repellent coating (water-repellent coating) coating
Moderate concern: wet-apparel water-repellent coating treatment frequently uses PFAS, but NRS/FITS makes no public disclosure either way.
⚠Waterproof or stain-proof treatment
FITS
DexShell Trekking Waterproof Socks
Merino wool blend with waterproof coating (unspecified)
Waterproof socks with unspecified water-repellent coating, PFAS risk unclear; contact brand for coating details before purchase.
⚠Waterproof or stain-proof treatment
Falke
TK1 Trekking Socks Men's
Merino wool blend with water-repellent coating finish
Lower concern for typical hiking socks, but Falke's water-repellent coating treatment source remains undisclosed.
⚠Waterproof or stain-proof treatment
Falke
Trekking Socks Men's Falke TK2
Merino wool blend with synthetic fibers, likely water-repellent coating finish
Lower concern, but typical water-repellent coating-treated sock, Falke doesn't disclose PFAS avoidance.
⚠Waterproof or stain-proof treatment
Falke
Men's TK2 Explore Cool Trekking Socks
Merino wool blend with synthetic fibers; moisture-wicking water-repellent coating treatment
Trekking socks likely treated with water-repellent coating, Falke discloses nothing about PFAS; moderate uncertainty.
⚠Waterproof or stain-proof treatment
Point6
Trekking Heavy Crew
Merino wool blend with water-repellent coating treatment
Moderate concern, merino sock with typical water-repellent coating finish, but no brand disclosure on PFAS status.
⚠Waterproof or stain-proof treatment
Point6
Core Extra Heavy Crew
merino wool blend with water-repellent coating finish
Skip until Point6 discloses water-repellent coating chemistry, merino wool crew socks likely treated with fluorinated water repellent, but no brand transparency.
⚠Waterproof or stain-proof treatment
Point6
Tracker Extra Light Crew
Merino wool blend with moisture-wicking treatment
Lower-concern baseline for a merino crew sock, but Point6's water-repellent coating treatment remains undisclosed.
⚠Waterproof or stain-proof treatment
Bombas
Women's Hiking Performance Quarter Socks (3-Pack)
Merino wool blend with synthetic performance fibers; water-repellent coating water-resistant finish
Lower-concern choice, but water-repellent coating source unclear, ask Bombas directly if seeking PFAS-free assurance.
⚠Waterproof or stain-proof treatment
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