Does Fitbit waterproof fitness trackers & cases have PFAS?
We graded 12 Fitbit waterproof fitness trackers & cases products, averaging Excellent (85/100). 12 of them grade Good or better. Against the other 25 waterproof fitness trackers & cases brands we grade, where the middle brand sits at 85/100, Fitbit is about typical, scoring above 60% of them.
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.
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 ↗
Sources checked September 14, 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
Fitbit
Luxe Fitness Tracker
Stainless steel case, elastomer band
Elastomer band degradation and skin irritation
Elastomer bands can degrade under UV exposure or high heat, potentially becoming sticky…
Bacterial or fungal growth under band
Any wearable band can trap moisture and sweat if not cleaned regularly, creating a…
Waterproof seal failure and internal corrosion
While the stainless steel case resists corrosion, repeated submersion or seal degradation…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Fitbit
Versa 3 Smart Watch
Aluminum case, elastomer band
Heavy metals
Aluminum alloys often contain nickel, cobalt, or chromium as strengthening agents. No…
Elastomer band degradation and plasticizer leaching
Elastomer compounds typically contain plasticizers or softening agents to maintain…
Bacterial or fungal growth in band material
Elastomer bands trap moisture and are difficult to fully dry; users commonly report skin…
Allergic contact dermatitis from unknown additives
Elastomer bands may contain accelerators, vulcanization agents, or colorants that can…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Fitbit
Sense Advanced Health Smartwatch
Stainless steel case, glass screen, elastomer/silicone band
Nickel in stainless steel (skin contact allergen)
Stainless steel case and any metal buckles or connectors contain nickel as part of the…
Skin irritation from moisture and bacteria trapping
Tight or prolonged band wear over damp skin can trap moisture and encourage bacterial or…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Fitbit
Inspire 3 Fitness Tracker
Plastic/elastomer band, stainless steel, glass display
Elastomer band degradation and sweat interaction
Elastomer bands may degrade or soften with prolonged sweat and heat exposure over months…
Bacterial growth under band
Moisture and skin contact under the band create a microenvironment where bacteria and…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Fitbit
Charge 5 Unicorn Beetle PRO Rugged Case and Band
Silicone/TPU band, polycarbonate case
Silicone and TPU degradation over time
Extended UV exposure or high heat can cause silicone and TPU to break down, potentially…
Skin irritation from residual manufacturing contaminants
Silicone and TPU bands may occasionally retain traces of uncrosslinked oligomers or…
Bacterial growth in band crevices if unwashed
Any band that contacts skin directly can trap bacteria and fungi in seams or texture if…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Fitbit
Google Fitbit Air Active Band
Elastomer band, likely rubber or silicone
Contact dermatitis or skin sensitization from elastomer additives
Silicone and synthetic rubber bands may contain accelerators, vulcanizing agents, or…
Bacterial or mold growth in crevices
Elastomer bands can trap moisture and sweat in gaps between band and device connector if…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Fitbit
Fintie Bands for Fitbit Versa 4/3/2/1/Versa Lite/Fitbit Sense 2/Sense
Silicone and stainless steel band
Nickel release from stainless steel hardware
Stainless steel connectors and buckles may contain trace nickel (typical 8-12% in…
Silicone degradation and discoloration
User forums document silicone bands yellowing, hardening, or becoming tacky after 1-2…
Bacterial colonization from moisture retention
Silicone's porous surface can trap sweat, oils, and bacteria if not cleaned regularly.…
Connector and buckle corrosion
Stainless steel hardware can corrode or discolor if exposed to salt water, chlorine, or…
Lower concern. Silicone bands rarely require PFAS-based treatments.
⚠Brand says nothing about PFAS
Fitbit
StrapsCo Active Protective Case Strap for Fitbit Charge 5
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 hygiene or infrequent washing…
Skin irritation or contact dermatitis
Some individuals report mild irritation from silicone wristband wear, though this is…
Material degradation and microplastic shedding
Lower-cost silicone or elastomer blends may degrade more rapidly and shed particles after…
Lower concern. Silicone strap unlikely to contain PFAS, but brand offers no disclosure.
⚠Brand says nothing about PFAS
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 contain release agents, UV stabilizers, or residual…
Bacterial or fungal growth on band surface
Silicone and elastomer surfaces can harbor bacteria and fungi if not cleaned regularly…
Degradation and microparticle shedding with age or UV exposure
Silicone and elastomer can degrade, become sticky, or shed microparticles after months of…
Allergic reaction to fragrance or dye in colored bands
If the band includes colorants or dyes (common in non-white elastomers), azo dyes or…
Lower concern; silicone bands rarely use PFAS, but material unconfirmed.
⚠Brand says nothing about PFAS
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 in…
Allergic contact dermatitis from manufacturing residues
Residual talc, sulfur, or mold-release agents from silicone molding can occasionally…
Low risk. Silicone and stainless steel don't typically contain PFAS.
⚠Brand says nothing about PFAS
Fitbit
North Street Watch Co. Rugged Rubber Case Strap for Fitbit Charge 6
rubber strap
Vulcanization residues and accelerators
Rubber straps contain trace zinc oxide and sulfur-based vulcanization agents used in…
Degradation products from sweat and heat
Sweat (salt, urea, lactic acid) and body heat can gradually break down rubber polymers…
Low risk. Rubber straps don't show typical PFAS warning signs.
⚠Brand says nothing about PFAS
Fitbit
Charge 6 Fitness Tracker
Elastomer band, stainless steel case
Elastomer contact dermatitis
Elastomer bands can trigger skin irritation in individuals with sensitive skin or rubber…
Elastomer degradation with heat/UV
Prolonged exposure to high temperature or direct sunlight can cause elastomer to become…
Bacterial or fungal growth in band material
The porous nature of elastomer can harbor bacteria or fungi if the band is not cleaned…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
See every Fitbit product we grade on the Fitbit brand page, or the full waterproof fitness trackers & cases ranking.