Fitbit · Waterproof Smartwatch Bands
WATERPROOF SCRUNCHIE elastic watch band for fitbit versa 1, versa 2, versa 3, Versa 4, Sense, and Sense 2 watch bands
Skip until Fitbit discloses coating chemistry or provides testing.
Fitbit does not disclose whether this waterproof scrunchie band uses PFAS-based water-repellent coating treatments. Waterproof textiles commonly contain PFAS; no third-party verification available.
The safe swap
Timex
Timex 12-16mm Hook & Loop Fast Wrap Replacement Watch Band Strap Adult
85/100 safety
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Elastic band with 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
This is an elastic fabric band (likely nylon or polyester blend) with an applied waterproof coating of unspecified chemistry. Waterproof coatings on fabric bands commonly use fluorochemicals (PFAS) or silicone-based polymers, but Fitbit has not publicly disclosed which. The elastomer and any adhesives bonding the coating are also not detailed, making full hazard assessment impossible. Direct skin contact over hours makes coating leachability relevant.
The brand's record and disclosure
Fitbit (owned by Google since 2021) has not publicly committed to PFAS-free manufacturing or published third-party testing of band coatings. The company does not appear in public PFAS phase-out pledges from major wearable brands. Fitbit's product safety disclosures typically reference regulatory compliance but do not address waterproof coating chemistry. No product-specific recalls for this band appear in FDA or CPSC databases as of available information.
How it compares in its category
Wearable bands fall into a gray zone where waterproofing claims often rely on coatings rather than inherent material water resistance. Most competitor replacement bands (Apple Watch, Garmin, third-party aftermarket) similarly withhold specific coating chemistry information, making this not uniquely opaque. However, some brands now advertise PFAS-free or fluorocarbon-free waterproofing; Fitbit is not among them. Third-party fabric bands with silicone-only waterproofing exist as an alternative if you prioritize avoiding fluorochemicals.
If you buy it
Rinse the band after saltwater or chlorine exposure to minimize coating degradation and any potential leaching. Do not soak or machine wash; hand wash only with mild soap and air dry to preserve the waterproof layer. Replace the band if visible peeling, cracking, or discoloration develops, as coating breakdown may increase leachate contact with skin. Contact Fitbit customer service to request specific safety data sheet (SDS) or testing information on the waterproof coating before purchase if PFAS avoidance is a priority.
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 leachates (non-PFAS)
Unspecified waterproof coating may release compounds into sweat or water. Even non-fluorinated waterproof polymers can leach plasticizers or oligomers with unknown dermal effects. No toxicity data on this specific coating formulation is publicly available.
Elastic degradation and microparticle shedding
Repeated flexing, sweat exposure, and UV light can degrade elastic fibers over time, potentially releasing microscopic fragments. Risk is low but increases with daily wear duration and inadequate rinsing after sweat exposure.
Contact dermatitis from coating or adhesives
Waterproof coatings and elastomer adhesives can trigger sensitization in users with fragrance-free or latex sensitivities. Fitbit does not disclose adhesive chemistry or conduct dermal compatibility testing visible to consumers.
Formaldehyde-releasing resins in elastic substrate
No recalls or reports of formaldehyde off-gassing from Fitbit bands specifically. However, synthetic elastic fabrics sometimes use formaldehyde-releasing finishing resins; Fitbit does not exclude or test for these.
Accelerated breakdown from heat or sunscreen
Waterproof coatings can degrade faster when exposed to high heat, sunscreen oils, or insect repellent. This accelerates potential leaching and shortens band lifespan, though health impact remains unquantified.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 35% 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 Smartwatch Bands
Timex
12-16mm Hook & Loop Fast Wrap Replacement Watch Band Strap Adult
Fabric strap with hook and loop fasteners
Lower concern fabric watch band, no high-risk treatment indicators documented.
⚠Brand says nothing about PFAS
Timex
Rubber watchband for TIMEX watch T2N720 TW2T76300 T2N721 Series Men
Rubber (elastomer, uncoated)
Lower concern. Bare rubber unlikely to contain PFAS intentionally.
⚠Brand says nothing about PFAS
Timex
T77601 Expedition Leather and Canvas Watch Strap (18mm)
leather and canvas
Lower concern. Leather and canvas unlikely to contain PFAS.
⚠Brand says nothing about PFAS
More waterproof smartwatch bands 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.