Coros · Waterproof Fitness Trackers
COROS Pace Pro GPS Sport Watch
Limited PFAS data for sports watches. Waterproofing raises concern.
COROS does not disclose PFAS in materials or coatings. Waterproof sports watches often use water-repellent coating treatments that may contain PFAS, though specific formulations are proprietary.
The safe swap
Withings
Withings BeamO 3-in-1 Health MultiScan
100/100 safety
Same rubric that flunked this product. The swap earned its A.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Titanium case, resin band, sapphire crystal, 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 Pace Pro uses a titanium case, which is a biocompatible, non-reactive metal that does not leach under normal use or sweat exposure. The sapphire crystal is synthetic aluminum oxide, also chemically inert. The resin band is the primary material of concern: polymer formulations vary widely, and resin can shed microparticles under flexing and UV exposure, though ingestion from a wrist-worn device is unlikely. The waterproof coating is unspecified by Coros, which is where PFAS risk concentrates in this product category, as fluorinated polymers are common in water-resistant seals.
The brand's record and disclosure
Coros does not publicly disclose material composition details, chemical testing results, or PFAS policy. The company has not faced major product safety recalls or published sustainability certifications. No independent lab reports on Coros watch materials are available in open literature. This silence on formulation makes it impossible to confirm whether the waterproof coating uses PFAS-free alternatives, a standard concern for any wearable water-resistant device.
How it compares in its category
Sports watches in general pose lower chemical exposure risk than cookware or textiles because contact is external, intermittent, and non-ingestion. Titanium cases are premium and preferred over aluminum or stainless steel for corrosion resistance and skin safety. Sapphire crystals avoid the durability and leaching issues of plastic or mineral glass. The resin band is typical for this price tier; silicone alternatives exist but are not inherently safer. The PFAS uncertainty in waterproofing is shared across nearly all water-resistant watches unless explicitly marketed as PFAS-free.
If you buy it
Rinse the band and case with fresh water after salt water or heavy sweat exposure to minimize salt corrosion and potential polymer degradation. Avoid prolonged direct sunlight to reduce UV-driven resin brittleness. Inspect the band yearly for cracks or visible wear; replace if flexing surfaces show white stress marks or flaking, as this indicates microparticle shedding. The titanium case is durable; the band is the wear item. Do not attempt to disassemble the waterproof seal; any breach service should use the manufacturer to maintain coating integrity.
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.”
Resin band microparticle shedding
Polymer resin bands degrade under UV, heat cycling, and repeated flexing. Shed particles are too large to penetrate skin but can accumulate on wrist; no long-term inhalation or ingestion pathway for a wrist-worn device, but replacement after 2-3 years of heavy use is prudent.
Waterproof coating PFAS content
Coros does not disclose the waterproof coating chemistry. Most water-resistant sports watches use Teflon-family coating sealants or hydrophobic treatments that may contain PFAS (perfluorooctane or similar); this is not Coros-specific but a category-wide gap in transparency.
Nickel or other skin allergens in band or metal fittings
Titanium is hypoallergenic and nickel-free. No reports of nickel sensitization from Coros watches exist, but polymer resin band composition is unspecified; if dyes or additives contain trace heavy metals, risk is very low and unconfirmed.
Sapphire crystal fragmentation
Sapphire can crack under impact but does not form small sharp splinters typical of glass; breakage is rare in the Pace Pro's sports-watch durability class and poses minimal injury risk compared to design.
Formaldehyde or flame retardants in resin
Sports watch resin bands are not typically formulated with flame retardants or high-formaldehyde resins because they are not textiles or furniture; no reports of this hazard in Coros watches, but material specs are not public.
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 Fitness Trackers
Withings
BeamO 3-in-1 Health MultiScan
Medical-grade stainless steel, plastic housing, medical sensors
Medical device with inherently low PFAS risk profile.
✓Naturally PFAS-free material
Whoop
Peak Health and Fitness Wearable 12-Month Membership
silicone band, electronics, stainless steel hardware
Wearable membership with minimal PFAS risk indicators.
⚠Brand says nothing about PFAS
Whoop
MG Navigator Band
Elastomer band (silicone-based or similar)
Lower concern fitness band, but brand silence on materials limits certainty.
⚠Brand says nothing about PFAS
More waterproof 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.