Non-Toxic Sports Performance Undergarments, ranked by PFAS grade
You may also be interested in
Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
All 85 sports performance undergarments PFAS Authority has graded score below its 70 point pass mark for PFAS and other toxins, as of October 2026.
The full ranking is below, best-graded first, with every score linking to the evidence behind it. Nothing here clears our buy threshold yet, so the least-concerning options come first.
Are sports performance undergarments safe?
None of the 85 sports performance undergarments we graded come back low-concern on our screen. Our grades are model-based assessments built from published materials, ingredient lists, certifications and brand disclosures, not laboratory tests, so they say what we can evidence rather than that anything is safe.
Best graded sports performance undergarments here
- 1PUMA Women's Quarter Crew Socks (6 Pairs) 65 out of 100
- 2Brooks Brothers Men's 3-Pack Cotton Boxers 65 out of 100
- 3Brooks Brothers Men's Supima Cotton Boxer Briefs 65 out of 100
Start here
The best non-toxic sports performance undergarments, ranked by grade
Buyer’s guide
What to look for in sports performance undergarments, and which brands grade best and worst
Why PUMA Women's Quarter Crew Socks (6 Pairs) grades highest here, and why that is not a pass
Every grade on this page is one sum. A category starts from a baseline, each disclosed material or coating adds risk points, and each thing the brand or a third party has published takes them away. Below is that sum for the winner, then for 2 products it beats, so you can see exactly where the 45 points between the top and the bottom of this sports performance undergarments ranking come from. Nothing in this category reaches our 70 point pass mark, so this is the shape of the field rather than a recommendation.
Top graded, and still below our pass mark
Made of Cotton/polyester blend socks, no waterproofing.
- +30Category baseline. The starting point for this type of product, before anything specific to this product is counted.
- +15No PFAS disclosure. No public statement from the brand about PFAS in this product.
- -10Base material not linked to PFAS. The main material recorded for this product is not one associated with PFAS.
35risk points in total, which is a grade of 65
What the grade does not fix. It still carries one risk factor, No PFAS disclosure, and our graders recorded 3 other hazards on it. See the full breakdown.
What it still grades above, and why
What puts it behind. Waterproof / stain-resistant treatment, +35 points. Water-repellent coating treatments have historically used PFAS. The top-graded product carries no such factor.
Made of Nylon blend with moisture-wicking treatment.
- +35Waterproof / stain-resistant treatment
- +30Category baseline
- +15No PFAS disclosure
80risk points, a grade of 20
What puts it behind. Waterproof / stain-resistant treatment, +35 points. Water-repellent coating treatments have historically used PFAS. The top-graded product carries no such factor.
Made of Polyester/nylon blend with moisture-wicking treatment.
- +35Waterproof / stain-resistant treatment
- +30Category baseline
- +15Vague safety claims only. Uses vague language ("eco-friendly", "clean") without a specific PFAS statement.
80risk points, a grade of 20
No product on this page was physically tested by us. Every number above comes from published materials, ingredient and coating disclosures, certifications and brand statements, scored on one public rubric. Formulations change without notice, so check the current product listing before buying.
Which sports performance undergarments contain PFAS? Poor and Bad, we’d swap these
- Cotton/polyester blend socks, no waterproofing
- Azo dyes
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- 100% cotton
- We found no PFAS statement from the brand
- Azo dyes and residual dye chemicals
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Supima cotton, no surface treatment disclosed
- We found no PFAS statement from the brand
- Formaldehyde / VOCs
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton/polyester blend, no stated water-resistant treatment
- We found no PFAS statement from the brand
- Azo dyes (color fastness and migration)
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton and polyester blend, uncoated
- We found no PFAS statement from the brand
- Azo dyes
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- cotton, elastane blend, uncoated fabric
- We found no PFAS statement from the brand
- Formaldehyde / VOCs
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton blend terry cloth
- Antimony in polyester
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Merino wool blend, no water repellent finish
- We found no PFAS statement from the brand
- Antimony in polyester
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton blend with elastane
- We found no PFAS statement from the brand
- Heavy metals
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- cotton/polyester blend, breathable mesh
- We found no PFAS statement from the brand
- Azo dyes (synthetic colorants)
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- polyester and elastane blend
- We found no PFAS statement from the brand
- Microplastic shedding (polyester fiber fragmentation)
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- nylon, polyester, elastane blend
- We found no PFAS statement from the brand
- Elastane (spandex) degradation and microfiber release
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Nylon, spandex blend fabric
- We found no PFAS statement from the brand
- Synthetic fiber shedding and microplastic release
- Nylon, spandex blend with mesh
- We found no PFAS statement from the brand
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton blend with elastic/polyester, moisture-wicking treatment unspecified
- We found no PFAS statement from the brand
- Azo dyes and synthetic colorants
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- cotton/polyester blend, breathable knit
- We found no PFAS statement from the brand
- Heavy metals
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- cotton/synthetic blend, no stated treatment
- We found no PFAS statement from the brand
- Heavy metals
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- polyester/elastane blend, moisture-wicking synthetic
- We found no PFAS statement from the brand
- Azo dyes and synthetic dye residues
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Cotton blend, elastane stretch
- We found no PFAS statement from the brand
- Residual dyes or chemical finishes from manufacturing
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- polyester blend, moisture-wicking synthetic fabric
- We found no PFAS statement from the brand
- Azo dyes in synthetic textiles
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Polyester blend, moisture-wicking, no disclosed coating
- We found no PFAS statement from the brand
- Azo dyes (azo colorants)
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Merino wool blend, nylon, elastane
- We found no PFAS statement from the brand
- Azo dyes in textile coloring
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Acrylic blend sock with no disclosed treatments
- We found no PFAS statement from the brand
- Azo dyes in synthetic fibers
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Merino wool blend, synthetic fibers
- We found no PFAS statement from the brand
- Microplastics
- 65Fruit of the Loom Men's 360 Stretch Max Flex Boxer Briefs
- 65Fruit of the Loom Men's Coolsoft Boxer Briefs
- 65Fruit of the Loom Women's Breathable Cooling Stripes Brief Underwear
- 65Fruit of the Loom Women's Breathable Micro-Mesh High-Cut Briefs (6
- 65Fruit of the Loom Women's Breathable Micro-Mesh Low-Rise Briefs (6
- 65Gap Men's 5" Boxer Briefs
- 65Gap Men's 5" Breathe Boxer Briefs
- 65Gap Women's Breathe Hipster
- 65Gap Women's Breathe Shorty
- 65Gap Women's Breathe Bikini by Gap
- 65Jockey Generation Infinity Cool Boxer Briefs
- 65Jockey Men's Active Microfiber 2.5" Trunk
- 65Jockey Men's Active Microfiber 4.5" Boxer
- 65Jockey Men's ActiveStretch 7" Long Leg Boxer Briefs
- 65Jockey Men's ActiveStretch Brief
- 65Jockey Men's RapidCool Brief
- 65Jockey Men's Stability Pouch Microfiber Boxer Briefs
- 65Lululemon Always In Motion Boxer 5" 7 Pack
- 65Lululemon Always In Motion Boxer Brief 3" 5 Pack
- 65Lululemon Soft Stretch Active Boxer Brief 7" 3 Pack
- 65Lululemon Soft Stretch Active Boxer Briefs
- 65Lululemon Underease Super-High-Rise Shortie Underwear Women's
- 65Lululemon Men's lululemon Always In Motion Boxer Brief 5" 3 Pack
- 65Lululemon UnderEase Mid-Rise Bikini Underwear 3-Pack
- 65New Balance Men's Mesh 5 No Fly Boxer Brief
- 65New Balance Men's Mesh No Fly Boxer
- 65New Balance Men's Moisture Wicking Lightweight Breathable Boxer Briefs
- 65New Balance Men's Premium 3 Inch Trunk No Fly
- 65New Balance Women's Athletics Brief 2.0
- 65New Balance Women's Athletics Brief v3
- 65Puma Men's Dry Cell Moisture Wicking Socks
- 65Puma Men's DryCell Crew Socks (8 Pair)
- 65Puma Men's Half-Terry Crew Socks (3 Pairs)
- 65Reebok Men's 7 Pack Performance Boxer Briefs, Medium
- 65Reebok Men's Cooling Performance Boxer Briefs
- 65Reebok Men's Featherweight Performance Boxer Briefs
- 65Reebok Men's Tech Comfort Sport Soft Boxer Briefs
- 65Reebok Mens Boxer Briefs - 6 Pack Big & Tall 7" Inseam Moisture Wicking Performance Mens Underwear Boxers with Contour P
- 65Reebok Women's Air Tech Performance Brief Panties 6-Pack
- 65Reebok Women's Seamless Hipster
- 65Smartwool Men's Run Targeted Cushion Mid Crew Socks
- 65Smartwool Men's Run Zero Cushion No Show Socks
- 65Smartwool Unisex Run Zero Cushion Crew Socks
- 65Smartwool Women's Run Targeted Cushion Low Ankle Socks
- 65Under Armour Men's Under Armour Charged Cotton 6-inch Novelty Boxerjock 3-Pack
- 65Under Armour Men's Under Armour Performance Tech Mesh-Mod 6 in 3 Pack
- 65Under Armour Men's 3-Units Boxer Brief
- 65Under Armour Men's Essential Tech Boxerjock 3-Pack
- 65Under Armour Men's Performance Tech Mesh Boxer Briefs
- 65Under Armour Men's Underwear & Socks Under Armour 3 6" Performance Boxerjock Boxer Briefs
- 65Reebok Men's Featherweight Performance Long Leg Boxer Briefs
- 65Old Navy Men's Go-Dry Cool Performance Boxer Briefs
- 65Jockey Men's Jockey 2-Pack RapidCool Boxer Briefs
- 20Feetures High Performance Ultra Light No-Show Tab
- 20Fruit of the Loom Men's Quick Dry & Moisture Wicking 360 Stretch Performance Boxer Briefs
- 20Brooks Women's Drive Interlace Run Bra
- 20Old Navy Men's Go-Dry Cool Performance Boxer- Brief Underwear 3-Pack
- 20Lululemon Always In Motion Boxer 5
- 20New Balance Men's Mesh Jersey Performance Wicking No Fly Boxer Briefs
- 20Smartwool Men's Run Cold Weather Targeted Cushion Crew Socks
- 20Under Armour Men's Tech
Get the graded list, free.
The products we score each week, and the best-graded alternative in every category.
No spam. Unsubscribe anytime.