Withings · Waterproof Smartwatches & Fitness Trackers
Withings ScanWatch Light Hybrid Smart Watch
No public PFAS disclosure; water resistance coating unknown
Withings does not publicly disclose PFAS use or avoidance in this smartwatch. Water-resistant electronics and sealed design may involve fluorinated compounds, but no confirmation available.
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
Stainless steel case, polymer straps, electronic components with 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 ScanWatch Light uses a stainless steel case, which is chemically stable and does not leach under normal wear. Polymer straps (likely silicone or elastomer blend) are common in wearables and pose minimal acute toxicity risk in skin contact. The critical unknown is the waterproof coating applied to internal electronics and case seams, which Withings does not publicly specify. Waterproof coatings in consumer electronics frequently contain PFAS (fluorinated polymers or water-repellent treatments), which are persistent and potentially bioaccumulative.
The brand's record and disclosure
Withings has not published a PFAS policy, restricted substance list, or materials transparency report in publicly available sources. The company does not appear on lists of brands with established PFAS reduction commitments (e.g., ZDHC, Safer Chemicals Alliance). No major recalls or safety controversies specific to the ScanWatch Light have been documented. Without proactive disclosure, buyers cannot verify whether waterproofing uses legacy PFAS, newer alternatives, or non-fluorinated methods.
How it compares in its category
Smartwatches and hybrid watches typically require waterproof coatings; most brands do not disclose coating chemistry. The ScanWatch Light's stainless steel construction is more durable than plastic cases, reducing replacement frequency and potential microplastic shed. Compared to fitness trackers with silicone-heavy designs, this hybrid watch balances durability with comfort. However, it lacks the transparency of premium watch brands that explicitly state coating materials.
If you buy it
Avoid prolonged immersion in heated water (hot tubs, saunas); thermal stress can degrade coatings and accelerate any leaching. Clean the strap regularly with mild soap and water to prevent sweat-salt corrosion of the case and polymer degradation. Do not attempt to disassemble or modify the water-resistant seals. If the strap shows cracking, discoloration, or odor after 2-3 years of use, replace it to limit polymer breakdown products in skin contact. Inspect the case for micro-cracks that might compromise the waterproof seal.
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 (undisclosed, likely PFAS or Teflon-family coating)
Withings does not publicly specify the chemistry of the water-resistance coating. Industry standard for smartwatches involves fluorinated polymers or Teflon-type coating-based treatments, which commonly contain PFAS. Without disclosure, baseline risk cannot be ruled out.
Polymer strap degradation and skin contact
Polymer straps (silicone or thermoplastic elastomer) can degrade with sweat, UV exposure, and thermal cycling, potentially releasing oligomers or residual monomers. Risk is low under normal use but increases if the strap is stored in heat or worn continuously for years without replacement.
Stainless steel case and nickel leaching
Medical-grade stainless steel (typically 316L or higher) in watch cases is highly resistant to corrosion and nickel leaching under normal skin contact. No documented cases of nickel sensitivity from the ScanWatch Light or similar Withings products have been reported.
Electronic component exposure (battery, PCB)
The sealed design prevents routine contact with internal electronics. If the seal is breached, exposure to battery electrolyte or solder flux residue is possible, but this is not a design hazard under normal use.
Brand transparency and accountability gap
Withings' silence on restricted substances, third-party certifications, and coating materials means users cannot verify compliance with emerging standards for PFAS and other persistent chemicals. This is a transparency issue rather than a confirmed contamination risk.
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 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.