Whoop Review, Is Whoop Non-Toxic?
Whoop averages 70 out of 100 on PFAS Authority's PFAS and toxin screen across the 6 Whoop products graded as of October 2026, and 4 of them reach its 70 point pass mark.
Whoop grades Good on our four-band scale. On disclosure, the brand says nothing publicly about PFAS. See what every brand has published about PFAS for how that compares.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
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Top-graded picks in the categories readers replace first, every one scored on the same rubric.
Aqua Pure
3M Aqua-Pure AP802B Whole House Filter Housing
- 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. See all of them.
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. See all of them.
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. See all of them.
Does Whoop have PFAS, by category
Worth buying from Whoop Good or better, best-graded first
Whoop
5.0 Loop Soft Whoop Peak Bands Watch Straps
- Elastomer loop fabric band
- We found no PFAS statement from the brand
- Azo dyes and aniline residues in colored elastomer, Colored elastomer bands may contain azo dyes applied…
3 hazards checked on this product. See all of them.
Whoop
CoreKnit Accessory Band
- Knit fabric, likely polyester or nylon blend
- We found no PFAS statement from the brand
- Microplastics, Polyester-nylon blends can shed microfibers during wear and washing. For a wrist-worn band…
2 hazards checked on this product. See all of them.
Whoop
Spigen WHOOP Series Band
- Silicone band
- We found no PFAS statement from the brand
- Silicone oligomer migration, Uncrosslinked oligomers can migrate from poorly cured silicone into skin…
3 hazards checked on this product. See all of them.
Whoop
Navigator 5.0 Band
- Silicone band with elastomer
- We found no PFAS statement from the brand
- Skin irritation or contact dermatitis, Silicone is hypoallergenic for most users, but prolonged moisture…
3 hazards checked on this product. See all of them.
Graded and flagged Poor and Bad, we’d swap these
Whoop
Nylon Sport Band for WHOOP 5.0 & MG
- Nylon with water-repellent coating treatment
- We found no PFAS statement from the brand
- PFAS, Whoop does not disclose whether the water-repellent treatment uses traditional PFAS (e.g., Teflon-type…
4 hazards checked on this product. See all of them.
Find an alternative on Amazon
Whoop
SuperKnit Accessory Band, One/Peak
- knit textile with waterproof treatment
- We found no PFAS statement from the brand
- Formaldehyde / VOCs, Knit textiles sometimes use formaldehyde-releasing resins for shape retention and dye…
4 hazards checked on this product. See all of them.
Find an alternative on AmazonWhat to buy instead Good or better, in the categories Whoop sells
Even Realities
Even R1 Smart Ring
- titanium, stainless steel, sapphire crystal
- We found no PFAS statement from the brand
- Band material variability
2 hazards checked on this product. See all of them.
Smart Ring 3 Silver / 9#19.1mm / Standard with 1 Charging Case
- Titanium alloy, sapphire crystal, stainless steel
- We found no PFAS statement from the brand
- Nickel leaching (from stainless steel components)
3 hazards checked on this product. See all of them.
Smart Ring Titan Rose Golden / 11#20.6mm
- Titanium alloy body with ceramic crown
- We found no PFAS statement from the brand
- Nickel leaching from alloy components
2 hazards checked on this product. See all of them.
Whoop and PFAS, common questions
- Does Whoop have PFAS?
- Whoop averages 70 out of 100 on PFAS Authority's PFAS and toxin screen across the 6 Whoop products graded as of October 2026, and 4 of them reach its 70 point pass mark. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is Whoop non-toxic?
- Whoop 5.0 Loop Soft Whoop Peak Bands Watch Straps is the highest-graded Whoop product we have scored, at 85/100. It depends on the product line rather than the brand, so check the grade of the exact item you are buying.
- Which Whoop products are lower concern for PFAS?
- The highest-graded Whoop products we have scored are Whoop 5.0 Loop Soft Whoop Peak Bands Watch Straps, WHOOP CoreKnit Accessory Band, Spigen WHOOP Series Band. That is our model-based estimate from materials and public disclosure, not a lab test.
- Which Whoop products should I avoid?
- The lowest-graded Whoop products we have scored are WHOOP SuperKnit Accessory Band, One/Peak, Nylon Sport Band for WHOOP 5.0 & MG. Each one links to the evidence behind its grade.
Every grade uses the same public rubric. How grades work →