Do Fitbit waterproof fitness trackers & cases have PFAS?
Fitbit waterproof fitness trackers & cases average 85 out of 100 on PFAS Authority's PFAS and toxin screen across the 12 Fitbit waterproof fitness trackers & cases graded as of November 2026, level with the 85 out of 100 median for the 24 other waterproof fitness trackers & cases brands graded alongside it.
Fitbit waterproof fitness trackers & cases average Excellent on our four-band scale. 12 of the 12 we graded are worth buying. That is above 60% of the waterproof fitness trackers & cases brands we grade.
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 waterproof fitness trackers & cases worth buying Good or better, best-graded first
- Silicone and stainless steel band
- Nickel release from stainless steel hardware. Stainless steel connectors and buckles may contain trace nickel…
4 hazards checked on this product, all on its full breakdown.
- rubber strap
- Vulcanization residues and accelerators. Rubber straps contain trace zinc oxide and sulfur-based…
2 hazards checked on this product, all on its full breakdown.
- silicone or elastomer strap, likely no intentional PFAS coating
- Bacterial or fungal growth (skin contact surface). Silicone wrist straps trap sweat and dead skin cells. Poor…
3 hazards checked on this product, all on its full breakdown.
Fitbit
Supcase Rugged Buckle Case for Fitbit Ionic,Strap Replacement Bands for Fitbit Ionic Smartwatch
- Silicone, elastomer, stainless steel bands
- Bacterial and mold growth. Silicone is porous and can harbor bacteria if not cleaned regularly, particularly…
2 hazards checked on this product, all on its full breakdown.
Fitbit
SUPCASE Unicorn Beetle Pro Series Design Replacement Bands for Fitbit Inspire & Fitbit Inspire
- Silicone or elastomer band (unspecified polymer)
- Skin sensitization or contact dermatitis from elastomer additives. Silicone and synthetic elastomers can…
4 hazards checked on this product, all on its full breakdown.
- Plastic/elastomer band, stainless steel, glass display
- Elastomer band degradation and sweat interaction. Elastomer bands may degrade or soften with prolonged sweat…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case, elastomer band
- Elastomer band degradation and skin irritation. Elastomer bands can degrade under UV exposure or high heat…
3 hazards checked on this product, all on its full breakdown.
- Aluminum case, elastomer band
- Heavy metals. Aluminum alloys often contain nickel, cobalt, or chromium as strengthening agents. No published…
4 hazards checked on this product, all on its full breakdown.
- Elastomer band, likely rubber or silicone
- Contact dermatitis or skin sensitization from elastomer additives. Silicone and synthetic rubber bands may…
2 hazards checked on this product, all on its full breakdown.
- Elastomer band, stainless steel case
- Elastomer contact dermatitis. Elastomer bands can trigger skin irritation in individuals with sensitive skin…
3 hazards checked on this product, all on its full breakdown.
- Silicone/TPU band, polycarbonate case
- Silicone and TPU degradation over time. Extended UV exposure or high heat can cause silicone and TPU to break…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel case, glass screen, elastomer/silicone band
- Nickel in stainless steel (skin contact allergen). Stainless steel case and any metal buckles or connectors…
2 hazards checked on this product, all on its full breakdown.
The same question, asked of the other waterproof fitness trackers & cases brands
Best average grade first. Fitbit averages 85.
See every Fitbit product we grade on the Fitbit brand page, or the full waterproof fitness trackers & cases ranking.