Do Fitbit water-resistant smart rings & bands have PFAS?
Fitbit water-resistant smart rings & bands average 76 out of 100 on PFAS Authority's PFAS and toxin screen across the 10 Fitbit water-resistant smart rings & bands graded as of November 2026, below the 85 out of 100 median for the 11 other water-resistant smart rings & bands brands graded alongside it.
Fitbit water-resistant smart rings & bands average Excellent on our four-band scale. 8 of the 10 we graded are worth buying.
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.
- 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.
What Fitbit says and does about PFAS
We found no PFAS policy published by Fitbit itself. Most Fitbit devices describe their bands only as a flexible, lightweight silicone material, which Android Authority called a vague description. Google, which owns Fitbit, has said it proactively limits PFAS in its products, and its supplier chemical specification caps PFHxA, one type of PFAS, at 25 ppb in all materials.
- MaterialsAndroid Authority reported that most Fitbit devices describe the strap only as a flexible, lightweight silicone material similar to that used in many sports watches. Android Authority (archived page) ↗
- Brand statementGoogle told Android Central it proactively limits PFAS in its products and is committed to minimizing PFAS beyond what is required by law. Android Central ↗
- Brand statementGoogle’s supplier chemical specification limits PFHxA and its salts to 25 ppb in all materials. Google supplier specification ↗
- StudyA University of Notre Dame study of 22 fitness tracker and smartwatch bands found elevated levels of perfluorohexanoic acid in nine of them, with some samples above 1,000 parts per billion. The study named no brands, so no result is attributed to this brand. University of Notre Dame ↗
- StudyThe same study tied its findings to bands manufactured using fluoroelastomers, and reported that elevated results were more common in bands costing more than about fifteen dollars. University of Notre Dame ↗
- Brand statementGoogle, which owns Fitbit, publishes a Restricted Substances Specification covering all Google-branded consumer hardware and accessories. It defines PFAS by structure, sets an all-materials limit of 25 parts per billion on perfluorohexanoic acid, and lists PFAS in all materials under a future phase-out requiring preauthorization rather than an existing prohibition. Google Restricted Substances Specification ↗
Sources checked October 1, 2026. A brand statement is the company’s own claim, which we report but have not verified. Our grades are model-based estimates, not lab tests.
Fitbit water-resistant smart rings & bands worth buying Good or better, best-graded first
- Elastane/spandex blend stretch fabric
- Formaldehyde / VOCs. Elastane blend fabrics may be treated with formaldehyde-based dyes or wrinkle-resist…
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Elastic silicone or rubber band
- Elastomer degradation and leaching. Silicone and rubber elastomers can release low-molecular-weight oligomers…
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Silicone and elastomer watch bands
- Coating degradation and leachables from band surface. Silicone itself does not degrade into toxic monomers at…
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Silicone elastomer band
- Skin contact sensitization or irritant dermatitis. Individual sensitivity to silicone or residual…
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Elastomer/silicone band
- Azo dyes and colorant safety. The band's color (Courtside implies a sports/team shade) may involve synthetic…
2 hazards checked on this product, all on its full breakdown.
- Elastomer/silicone band
- Silicone degradation and particulate shedding. Silicone bands can degrade over extended use (12-24+ months)…
- Elastomer band
- Elastomer degradation and hygiene. Elastomer bands can accumulate bacteria and sweat residue in seams over…
3 hazards checked on this product, all on its full breakdown.
Fitbit
Mykomi Waterproof Bands for Fitbit Versa 3 / Fitbit Versa 4 / Fitbit Sense
- Silicone elastomer
- Silicone degradation over time. Silicone elastomer can lose elasticity and develop micro-tears with prolonged…
2 hazards checked on this product, all on its full breakdown.
Which Fitbit water-resistant smart rings & bands contain PFAS? Poor and Bad, we’d swap these
- Silicone, elastomer, or Teflon-family coating elastomer (unspecified)
- Elastomer additive migration (plasticizers, slip agents). Silicone and elastomer bands contain processing…
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Nylon blend with water-resistant treatment
- Formaldehyde / VOCs. Nylon textiles often retain trace formaldehyde from dye-fixing and resin treatments…
4 hazards checked on this product, all on its full breakdown.
Find an alternative on AmazonBetter water-resistant smart rings & bands from other brands
Graded higher than the Fitbit average of 76.
- titanium, stainless steel, sapphire crystal
- We found no PFAS statement from the brand
- Band material variability
2 hazards checked on this product, all on its full breakdown.
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, all on its full breakdown.
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, all on its full breakdown.
The same question, asked of the other water-resistant smart rings & bands brands
Best average grade first. Fitbit averages 76.
See every Fitbit product we grade on the Fitbit brand page, or the full water-resistant smart rings & bands ranking.