Swatch · Water-Resistant Smart Rings & Bands
Swatch ASUVT100 Strap
Standard watch strap carries no known PFAS use.
Swatch straps are typically rubber or silicone without water-repellent coatings. No documented PFAS concerns for this product line.
The better-graded swap
PRIMEPLUS Smart Ring Health Tracker
85/100 safety
Same rubric that flunked this product. The swap earned Excellent.
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Material
Rubber/elastomer strap
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Swatch ASUVT100 Strap is made of, ingredients and materials
The ASUVT100 is a rubber or synthetic elastomer strap, the standard material for casual sports and everyday watch bands. Rubber straps avoid ceramic, enamel, and metal coating hazards that plague some cookware and jewelry. The elastomer itself is inert during normal wear; risk arises only from additives (colorants, accelerators, plasticizers) used during vulcanization and from degradation if exposed to prolonged heat or UV.
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.
Formaldehyde / VOCs
Some elastomer manufacturing processes use formaldehyde-based accelerators; however, residual formaldehyde in finished watch straps is typically minimal and not documented as a complaint for this product category at consumer levels.
Source, ATSDR ↗Material degradation and particulate shedding
Rubber degrades with UV, heat, and ozone exposure, potentially releasing small elastomer particles. Over several years, a worn strap may flake slightly, though the quantity and health relevance are negligible for a wrist-worn product.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Azo dyes and colorant allergens
No recalls or reports of azo dye use or allergic reactions linked to Swatch rubber straps exist. Standard rubber dyes undergo routine industry vetting, though composition is proprietary.
BPA & bisphenols
Rubber straps do not rely on BPA or phthalates for flexibility; their elasticity is inherent. No known leaching events from Swatch straps have been reported, and the brief skin contact on the wrist minimizes absorption risk.
Source, FDA ↗Lead
Lead and cadmium are not typical in modern rubber strap dyes; Swatch, as a major brand, would face regulatory pressure in the EU and North America if such contamination existed. No public records document this hazard for this product.
Source, ATSDR ↗The full breakdown
The brand's record and disclosure
Swatch is a mass-market Swiss watchmaker with no known major chemical safety recalls or certifications specific to watch strap composition. The company does not publicly disclose detailed material safety data for straps, which is typical for the watch category. No established controversies regarding formaldehyde, azo dyes, or antimony contamination in Swatch straps have been reported in public databases.
How it compares in its category
Rubber watch straps sit in the lower-risk end of textile and elastomer products because contact is brief and external (wrist). They show lower concern than apparel worn against skin for hours or swimwear. Comparable silicone and rubber straps from competitors (Timex, Apple, Casio) have no documented hazard profile differences; material composition is largely standardized across brands.
If you buy it
Rinse the strap with cool water after swimming or heavy perspiration to remove salts and chlorine, which can degrade rubber over time. Avoid leaving it in direct sunlight or hot vehicles for extended periods, as UV and heat accelerate elastomer breakdown. Replace the strap if it shows cracking, stickiness, or discoloration; these indicate material failure. Standard hand washing with mild soap is recommended.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Swatch has made none
Formulations change between production runs, so check the current label. How we grade.
More water-resistant smart rings & 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.