Fitbit · Waterproof Smartwatches & Fitness Trackers
Fitbit Charge 6 Health & Fitness Tracker
No PFAS disclosure. Waterproof coating composition unconfirmed.
Fitbit does not publicly disclose PFAS use or absence in Charge 6. Waterproof/water-resistant electronics typically employ water-repellent coating coatings that may contain PFAS, but specific materials are not specified by the brand.
The safe swap
Swatch
Swatch Chrono 42 Quartz Watch
85/100 safety
Same rubric that flunked this product. The swap earned its B.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Plastic band, metal buckle, unspecified waterproof coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
The Fitbit Charge 6 uses a plastic elastomer band (likely TPU or silicone-based) with a stainless steel or plated metal buckle and an undisclosed waterproof coating on the display/casing. The band contacts skin directly for extended periods, making material purity relevant. The waterproof coating is the critical unknown: manufacturers often use PFAS-based hydrophobic treatments (Teflon-family coating) to achieve water resistance in wearables, though Fitbit has not publicly disclosed the specific chemistry.
The brand's record and disclosure
Fitbit (owned by Google since 2021) has not issued public statements about PFAS use in wearables or waterproof coatings. The company does not list full material composition or coating specifications in publicly available technical documents. No recalls related to chemical leaching or coating degradation have been documented for the Charge 6 model. The silence on waterproof coating composition is the primary concern, as this is where PFAS risk would typically concentrate.
How it compares in its category
Most fitness trackers in this price tier (USD 150-200) use similar plastic-band-plus-waterproof-coating designs, and transparent disclosure of coating chemistry is rare across the category. Competitors like Garmin and Apple also rarely disclose PFAS presence, making Fitbit typical rather than exceptional. Some newer brands (e.g., Withings) have begun offering PFAS-free coating options, setting a higher standard that Fitbit has not matched.
If you buy it
Clean the band regularly with mild soap and water to reduce any residue accumulation from sweat or cosmetics. Avoid prolonged exposure to extreme heat (e.g., leaving in direct sunlight or using in hot tubs above 104F/40C), which can accelerate coating degradation. Replace the band every 1-2 years if visible cracking, peeling, or discoloration appears. If skin irritation develops after use, discontinue wear and rinse thoroughly; this may indicate sensitivity to the band material or coating.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Waterproof coating composition (PFAS risk proxy)
The waterproof coating type is not disclosed. If Teflon-family coating-based (common in wearables), it may contain PFAS; if fluorine-free, the risk is lower. No product-specific testing results are public.
Elastomer band skin contact
No recalls or adverse events documented for Charge 6 band contact dermatitis. TPU and silicone elastomers are generally well-tolerated, though individual sensitivity varies.
Metal buckle leaching
Stainless steel or plated buckles are low-risk for nickel leaching if materials are compliant with EU/US regulations. No product-specific testing published.
Coating degradation and microparticle shedding
Repeated flexing and UV exposure can cause waterproof coatings to crack or peel over time. Shed particles are not documented to pose toxicity risk, but this degrades water resistance and may indicate structural failure.
Plastic off-gassing
Charge 6 has been on market since 2023 with no reported chemical odor or off-gassing complaints. Plastic components are unlikely to leach into skin at room temperature.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Waterproof Smartwatches & Fitness Trackers
Swatch
Chrono 42 Quartz Watch
Stainless steel case, mineral/plastic crystal, standard watch components
Lower concern. Standard watch materials pose minimal PFAS risk.
⚠Brand says nothing about PFAS
Swatch
SEA WASP
Plastic/resin watch case and strap
Typical consumer watch, no known PFAS risk signal identified
⚠Brand says nothing about PFAS
Swatch
Neon Seppia Big Bold Chrono Quartz Watch
Stainless steel case, plastic/resin band, mineral or acrylic crystal
Lower concern. Standard watch materials typically lack intentional PFAS use.
⚠Brand says nothing about PFAS
More waterproof smartwatches & fitness trackers grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.