Suunto · Water-Resistant Smart Rings & Bands
Suunto Silicone Band - Rugged, Waterproof, Flexible Design green / 20mm
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes silicone elastomer, 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
Silicone elastomer
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.
Vague safety claims only
Uses vague language ("eco-friendly", "clean") without a specific PFAS statement.
Bacterial or fungal growth on elastomer surface
Silicone is hygroscopic and can harbor microbes in skin folds and crevices if not dried regularly. Risk is minimal with weekly cleaning but increases in warm, humid climates or during continuous 24/7 wear without air-drying.
Degradation from UV, ozone, or chlorine
Prolonged poolside storage or intense sun exposure can cause silicone to discolor, stiffen, or crack over years. This is cosmetic wear, not a chemical hazard, but shortens product lifespan.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Heavy metals
Silicone colorants are typically approved organic pigments or inorganic iron oxides and titanium dioxide. No cadmium, lead, or chromium has been reported in Suunto silicone bands. The green color does not flag a known hazard.
Source, FDA ↗Skin sensitization or allergic reaction
Medical-grade silicone used in wearables is hypoallergenic and rarely triggers contact dermatitis. A small subset of users report irritation from sweat buildup or band tightness, not the material itself.
Silicone leaching or degradation into skin
Silicone elastomers do not leach oligomers or degradation products into skin at body temperature. This is one reason silicone is preferred over PVC or other plastics in body-contact wearables.
The full breakdown
What it's made of and why it matters
This band is silicone elastomer, a synthetic rubber polymer that does not contain BPA, phthalates, or other common leaching plasticizers by default. Silicone is non-reactive with skin oils and sweat, and resists temperature swings better than softer plastics. The green color is achieved via pigment dispersion; no coating or surface treatment is named, so the hazard surface is the elastomer itself.
The brand's record and disclosure
Suunto is a Finnish sports-watch manufacturer with ISO 9001 and ISO 14001 certifications and a published sustainability commitment, though specific materials transparency is limited. No PFAS statement has been found for this band; the brand does not advertise waterproofing via PFAS-based coatings. No recalls or health complaints are on record for Suunto silicone bands.
How it compares in its category
Silicone bands are the standard for water-resistant smartwatch and activity-tracker accessories because they are durable, non-allergenic for most users, and do not rely on chemical coatings for water resistance. This product sits firmly in the mainstream; comparable offerings from Fitbit, Garmin, and Apple use the same material class. Silicone bands typically outlast fabric or leather alternatives in saltwater and chlorine environments.
If you buy it
Rinse after saltwater or chlorine exposure to prevent buildup and odor. Avoid prolonged contact with strong solvents or high heat above 60C (silicone degrades slowly at higher temperatures). Replace if the band tears, cracks, or becomes sticky; silicone can degrade over 2-3 years of daily wear depending on UV and sweat exposure. Clean with mild soap and water weekly to prevent bacterial or fungal growth in the wear surface.
What we don’t know
- Basis
- Model estimate, 42% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Suunto 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.