TomTom · Waterproof Smartphone Cases
TomTom Multi-Sport Cardio GPS Watch
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes polymer case, elastomer band, 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
Polymer case, elastomer band
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.
Elastomer band degradation and skin contact
Elastomer materials can accumulate bacteria and fungi in microscopic pores when exposed to sweat and moisture, especially if not rinsed regularly. While the material itself is not toxic, poor hygiene of the band may trigger contact dermatitis or localized skin infections in sensitive individuals.
Polymer case brittleness under UV and thermal stress
Polymer cases without UV stabilizer additives (not disclosed by TomTom) may become brittle or discolored after months of outdoor sun exposure. Brittle polymers can crack and expose internal electronics, though this poses minimal acute chemical risk unless internal lithium battery is punctured.
Sweat and salt corrosion of internal components
Waterproof seals on sports watches can degrade over time, allowing sweat and salt to reach internal metal contacts and battery terminals. This is a durability concern (device failure) rather than a direct user safety hazard, but corrosion products (metal oxides) can theoretically leak if seals fail catastrophically.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Microplastic shedding from band wear
No published testing of this specific model or elastomer formulation for microplastic release has been reported. General concern for elastomer bands is low under normal wear; significant shedding typically requires heavy mechanical abrasion or high-temperature exposure.
Heavy metals
The sealed polymer case design protects against direct contact with internal circuit boards and solder. No recalls or safety alerts specific to TomTom sports watches involving lead solder or cadmium components are on public record; industry standards for consumer electronics generally limit these hazards.
Source, FDA ↗The full breakdown
What it's made of and why it matters
The TomTom Multi-Sport Cardio case is polymer (likely acrylic or polycarbonate blend) with an elastomer (rubber) band. Polymer cases in sports watches are chosen for durability and impact resistance; elastomer bands are skin-contact materials selected for flexibility and sweat tolerance. Neither material class typically involves lead, cadmium, or intentional heavy-metal glazes as seen in ceramic cookware, and the sealed electronics design limits leaching pathways.
The brand's record and disclosure
TomTom has not issued a public PFAS statement for this product line, and no coating composition has been disclosed by the brand. The company has not faced major recall actions or safety litigation related to this sports watch category on public record. Transparency on material sourcing and chemical treatments remains limited, which is common across sports-tech brands but prevents independent verification of supply-chain practices.
How it compares in its category
Sports watches with polymer cases and elastomer bands represent the mainstream choice in this segment, favored over metal cases for lighter weight and better skin comfort. Compared to silicone-band alternatives, elastomer is broadly comparable in safety profile; neither requires surface coatings that would introduce volatile organic compounds. The sealed design (typical of waterproof GPS watches at IP ratings) is a safety advantage because it isolates electronics from direct skin contact and sweat exposure.
If you buy it
Rinse the band with fresh water after sweaty or saltwater use to reduce skin irritation from salt buildup and bacterial colonization in elastomer pores. Avoid prolonged exposure to extreme heat (e.g., direct sunlight in cars or near radiators) which can degrade elastomer elasticity and cause minor polymer brittleness over years of use. Replace the band if it shows visible cracking, discoloration, or odor; the case itself is typically serviceable for the product's rated lifespan if not physically damaged. Store in a cool, dry place to slow material aging.
What we don’t know
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- TomTom has made none
Formulations change between production runs, so check the current label. How we grade.
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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.