All 52 waterproof sports undergarments we scored fail our PFAS screen
All 52 waterproof sports undergarments PFAS Authority has graded score below its 70 point pass mark for PFAS and other toxins, as of November 2026.
Every grade below is built from published materials, ingredient lists, certifications and brand disclosures, scored on one public rubric and ranked best-graded first. Each score links to the full breakdown of what earned it, and the numbers across the whole dataset are published too.
Are waterproof sports undergarments non-toxic?
None of the 52 waterproof sports undergarments we graded clear our screen. Non-toxic is not a defined or regulated term, so what we can tell you is what our graders recorded. Beyond PFAS, the hazards found or left unruled-out on waterproof sports undergarments in this category are microplastics, artificial dyes, formaldehyde, heavy metals, undisclosed fragrance.
Why Calvin Klein Men's Intense Power Sport Tee 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 waterproof sports 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-blend knit jersey, uncoated.
- +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 polyester blend with Dri-FIT 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 Synthetic blend with moisture-wicking and UPF 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.
What to watch for in waterproof sports undergarments
Beyond the PFAS grade, these are the things our graders recorded on the 52 waterproof sports undergarments in this category. We assess from materials, brand statements and published research. We do not lab-test.
- Microplastics
Plastic fragments small enough to shed from a product into food, water or air without anyone seeing it.
Found on 19 of these waterproof sports undergarments. Plausible but unconfirmed on 17 more, meaning nobody has ruled it out. EPA
- Artificial dyes
Synthetic colours added to food, cosmetics and textiles, most of them petroleum derived.
Plausible but unconfirmed on 27 more, meaning nobody has ruled it out. FDA
- Formaldehyde
A preservative and resin ingredient that is also released slowly by a group of chemicals used in its place.
Plausible but unconfirmed on 24 more, meaning nobody has ruled it out. NCI
- Heavy metals
Metals such as antimony, nickel and chromium migrating from a material into what touches it.
Plausible but unconfirmed on 13 more, meaning nobody has ruled it out. ATSDR
- Undisclosed fragrance
A single word on a label that can stand for dozens of undeclared ingredients, protected as trade secret.
Plausible but unconfirmed on 9 more, meaning nobody has ruled it out. FDA
The safest waterproof sports undergarments we graded, lowest PFAS risk first
Nothing in this category clears our buy threshold yet. That is the finding, not a gap.
See PFAS-free waterproof sports undergarments on AmazonThe waterproof sports undergarments we would skip
Lowest scoring in this category, worst first, with the reason.
- 20Nike Men's Dri-FIT Ready Fitness T-ShirtBad
Antimony in polyester fiber
- 20Nike Women's Swift Breathe Dri-FIT Running Tank TopBad
water-repellent coating (water-repellent coating) fluorochemical finish
- 20Bad
What we check on waterproof sports undergarments
- Confirmed PFAS, PTFE or fluoropolymer content, which is the heaviest penalty we apply.
- Stain, water or grease resistant treatments, which usually mean fluorinated chemistry.
- Whether the brand discloses what is in the product, or stays silent behind a “clean” claim.
- Independent lab results and certifications where they exist.
Full point-by-point rubric on the methodology page.
The waterproof sports undergarments brands we found no PFAS statement from
We found no PFAS statement from 5 of the brands here. That is our research, not proof a brand has never said anything, and it is not evidence of harm. It is why none of them score well on disclosure.
Brooks, Calvin Klein, Carhartt, Saucony, Tommy Hilfiger.
The brands that have published something, and what each of them actually said, are in our record of what every brand has said about PFAS.
Common questions about PFAS in waterproof sports undergarments
Are waterproof sports undergarments PFAS free?
All 52 waterproof sports undergarments PFAS Authority has graded score below its 70 point pass mark for PFAS and other toxins, as of November 2026. The lowest graded is Nike Men's Dri-FIT Ready Fitness T-Shirt at 20 out of 100.
Are waterproof sports undergarments non-toxic?
None of the 52 waterproof sports undergarments we graded clear our screen. Non-toxic is not a defined or regulated term, so what we can tell you is what our graders recorded. Beyond PFAS, the hazards found or left unruled-out on waterproof sports undergarments in this category are microplastics, artificial dyes, formaldehyde, heavy metals, undisclosed fragrance.
Which waterproof sports undergarments should I avoid?
The three lowest scoring we hold are Nike Men's Dri-FIT Ready Fitness T-Shirt at 20, Nike Women's Swift Breathe Dri-FIT Running Tank Top at 20, Calvin Klein Plus Womens Moisture Wicking Workout Pullover Top at 20. The problem with the first is that lower concern for standard athletic tee, but DWR finish may contain PFAS.
Which waterproof sports undergarments brands have not published a PFAS statement?
We found no PFAS statement from 5 of the brands we scored in this category, including Brooks, Calvin Klein, Carhartt, Saucony, Tommy Hilfiger. That is what our research turned up, not proof a brand has never said anything, and a missing statement is not evidence of harm. It is the reason those brands cannot score well on disclosure.
Do you lab test waterproof sports undergarments?
No. We score from published ingredient lists, materials, certifications, disclosures and third party lab results where they exist. Where a product has been independently tested we use that result and say so.
More food and water categories we have graded
Same rubric, same scale. These are the categories closest to waterproof sports undergarments.
- Best non-toxic water filters530 graded
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- Best non-toxic lunch boxes189 graded
- Best non-toxic food packaging187 graded
- Best non-toxic waterproof boots105 graded
- Best non-toxic waterproof mascara89 graded
- Best non-toxic portable water bottles78 graded
- Best non-toxic phone battery cases75 graded
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Does a particular brand of waterproof sports undergarments have PFAS?
Brands we grade across the catalogue
Everything we have scored from these brands, not just waterproof sports undergarments.
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