Misfit · Waterproof Fitness Trackers & Cases
Misfit Shine Sleep/Activity Monitor
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes stainless steel, polycarbonate, 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
Stainless steel, polycarbonate
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.
Stainless steel nickel content
Stainless steel typically contains 8-12% nickel to prevent rust. Individuals with nickel sensitivity may experience dermatitis with prolonged skin contact. Barrier creams or a textile barrier under the watch can mitigate this; this risk is inherent to stainless steel wearables, not specific to Misfit.
Polycarbonate stress cracking or degradation
Extended UV exposure or mechanical flexing can cause microcracking in polycarbonate over 2-3 years. Cracks expose underlying polymers and adhesives but pose low toxicity risk; they primarily reduce functionality. Replace the band if visible damage occurs.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
BPA & bisphenols
Polycarbonate housing and band do not contact food, mouth, or high-temperature environments. Leaching risk to skin is negligible under normal wear conditions, and no incidents have been reported for this product model.
Source, FDA ↗Adhesive or trace solvent residue in assembly
Manufacturing adhesives and processing solvents are typically volatile and dissipate during curing. No adhesive or volatile organic compound issues have been documented for the Misfit Shine; this is standard electronics assembly risk, not specific to this brand.
Electronic component hazards (battery, circuit board)
The device contains a battery and circuitry, standard for wearables. No known defects, battery leaks, or toxic component hazards have been reported for this model. Keep away from sustained moisture immersion and extreme temperatures to preserve battery integrity.
The full breakdown
What it's made of and why it matters
The Misfit Shine uses stainless steel for the watch body and polycarbonate for the band and housing. Stainless steel is inert and does not leach under normal skin contact conditions. Polycarbonate can theoretically release BPA during manufacturing or under stress, but this device does not involve food contact, heating, or mechanical stress patterns that trigger leaching into skin or sweat; the polymer remains stable in the wearable context.
The brand's record and disclosure
Misfit has published no formal PFAS statement or third-party material certifications on record for this product. The company does not claim to avoid any chemical class, nor are there documented recalls or regulatory warnings tied to material hazards. As a fitness wearable with limited surface area and no heat exposure, the absence of disclosure does not indicate hidden risk; it reflects the category norm for small electronics.
How it compares in its category
Waterproof fitness trackers typically use silicone or polyurethane bands (both stable polymers) and aluminum or stainless steel housings. The Misfit Shine's material mix is standard and conservative for the category. No competitor in this segment routinely discloses PFAS use or faces chemical safety concerns beyond typical electronics manufacturing, so the Misfit sits at baseline risk.
If you buy it
Wear it as intended without modifications; polycarbonate and stainless steel require no special care beyond routine water rinsing. Do not expose the device to prolonged heat (>60°C/140°F), excessive UV, or solvents, as these can degrade the polymer over years. Replace the band if visible cracking occurs to prevent skin irritation. Clean with soft cloth and mild soap; no harsh chemicals needed.
What we don’t know
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Misfit 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.