Fitbit · Waterproof Fitness Trackers & Cases
Fitbit Charge 6 Fitness Tracker
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes elastomer band, stainless steel case, with no water-repellent coating named. Water resistance on products like this usually comes from the material and its seals rather than a surface treatment. The brand has published no PFAS statement for it.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Elastomer band, stainless steel case
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Elastomer contact dermatitis
Elastomer bands can trigger skin irritation in individuals with sensitive skin or rubber allergies, though this is user-dependent and not a product defect. Regular cleaning and occasional removal reduce risk.
Elastomer degradation with heat/UV
Prolonged exposure to high temperature or direct sunlight can cause elastomer to become sticky, brittle, or discolored over years of use; this is normal wear, not acute toxicity.
Bacterial or fungal growth in band material
The porous nature of elastomer can harbor bacteria or fungi if the band is not cleaned regularly, especially in damp conditions; this is a hygiene issue rather than a chemical hazard.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Stainless steel nickel leaching
Medical-grade stainless steel (typically 316L) in wearables is highly resistant to nickel leaching at skin pH; no reported cases of nickel sensitivity from Fitbit Charge 6 contact.
Lead
No recalls or test reports indicate lead or cadmium in the Charge 6 case or band; stainless steel and elastomer do not inherently contain these metals.
Source, ATSDR ↗The full breakdown
What it's made of and why it matters
The Fitbit Charge 6 uses an elastomer (rubber-like polymer) band and stainless steel case. Elastomer bands do not typically leach BPA or phthalates at skin temperature, and stainless steel is chemically inert and resistant to corrosion. The main concern with elastomer is potential for contact dermatitis in sensitive individuals, though this is a user-specific reaction rather than a manufacturing defect. No coating or treatment has been disclosed by Fitbit that would introduce additional chemical hazards.
The brand's record and disclosure
Fitbit (owned by Google since 2021) does not publicly disclose PFAS use or avoidance in its wearables, and no major chemical safety controversies or recalls for the Charge 6 have been documented in public health databases. The company provides standard materials disclosure in product documentation but does not publish independent safety certifications for this device. Fitbit has faced no widespread complaints of toxic off-gassing, allergic reactions, or contamination tied to this specific model.
How it compares in its category
Most fitness trackers at this price point use similar elastomer and stainless steel combinations, making the Charge 6 materially typical for the category. Unlike some budget wearables with untested elastomer formulations, Fitbit is an established brand with supply-chain oversight. Some premium competitors offer hypoallergenic band options (silicone or titanium) but the Charge 6 does not; users with sensitive skin may need aftermarket band replacements.
If you buy it
Wash the band regularly with mild soap and water, especially after sweating or swimming, to reduce skin irritation risk. Avoid prolonged exposure to very hot water or direct heat sources, which can degrade elastomer over time. If you develop persistent skin redness or itching under the band, try removing it for a few hours daily to allow air circulation. Replace the band if it becomes visibly cracked, stiff, or sticky, as degraded elastomer may increase contact irritant risk.
What we don’t know
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Fitbit has made none
Formulations change between production runs, so check the current label. How we grade.
More waterproof fitness trackers & cases 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.