Onn · Water-Resistant Smart Rings & Bands
Onn Universal Fit Silicone Watch Band for Apple, Samsung Galaxy & Garmin
Silicone watch band with no coating on record and no PFAS disclosure from brand.
Material as recorded is silicone elastomer, not a material linked to PFAS. No water-repellent finish on record. Brand has no PFAS statement on record.
The better-graded swap
Oura
Oura Ring 4 Size Smart Ring
85/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Silicone elastomer
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Onn Universal Fit Silicone Watch Garmin is made of, ingredients and materials
This Onn band is silicone elastomer, a synthetic rubber polymer chosen for watch straps because it resists degradation, doesn't leach into skin under normal wear, and tolerates temperature swings. Silicone is chemically inert at body temperature and does not off-gas volatile organic compounds (VOCs) the way some thermoplastic polyurethanes or PVC alternatives do. The "universal fit" design typically uses injection-molded silicone with minimal adhesives, reducing risk of problematic glues or solvents remaining in the finished product.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Residual solvents from manufacturing
Injection-molded silicone may retain trace mold-release agents or processing solvents if not adequately purged; outgassing typically occurs within the first few days of opening and diminishes with airing out.
Mold or bacterial colonization
Any elastomer worn continuously against skin in warm, moist conditions can harbor bacteria or mold if not cleaned regularly; silicone itself does not promote growth, but trapped sweat and dirt do. This is a maintenance issue, not a material defect.
Degradation and particulate shedding over time
Lower-cost silicone formulations may become tacky, discolor, or develop surface micro-cracks after extended UV exposure or repeated thermal stress; shedding of silicone particles into skin is not known to cause harm, but degraded material may trap bacteria.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Skin sensitization from additives
No documented cases of allergic reaction to Onn silicone bands. Silicone itself is hypoallergenic, though colorants or cross-linking additives in cheaper formulations could theoretically trigger sensitivity in susceptible individuals; no public reports exist for this product.
Lead
Reputable silicone suppliers avoid lead-based pigments in consumer wearables. No test results or recalls cite heavy metal contamination in Onn watch bands; risk is low but not independently verified.
Source, ATSDR ↗How is this PFAS grade calculated?
The brand's record and disclosure
Onn is Walmart's private-label electronics brand; parent company Walmart has published limited chemical disclosure policies but does not routinely publish third-party test results for accessory items like watch bands. No specific safety certifications or independent testing results for this model are publicly available. Walmart has faced scrutiny on PFAS use in other product lines but has not issued product-specific statements on silicone watch band composition. No recalls or hazard complaints have been publicly documented for this exact product.
How it compares in its category
Silicone watch bands present lower concern than vinyl (PVC), which can contain phthalate plasticizers, or cheaper thermoplastic rubber blends that may off-gas. Most Apple Watch and Garmin official bands use silicone for the same reason. Third-party silicone bands like this Onn offering typically cost less than OEM equivalents but use similar base material; the main quality variable is mold finish and adhesive quality rather than toxicology.
If you buy it
Inspect the band upon arrival for strong chemical odors, which could indicate residual solvents or mold-release agents; air it out for a few hours if you detect any smell. Clean periodically with mild soap and water to remove sweat and dirt buildup, which can trap moisture and degrade the material or cause skin irritation. Silicone remains stable across typical wrist temperatures (32-104 F) and shows no hazard of this kind on record for continuous skin contact. Replace if you notice visible cracking, stickiness, or discoloration, though well-made silicone bands typically last 2-3 years with routine care.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Onn 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.