TomTom · Waterproof Fitness Trackers & Cases
TomTom Spark Fit Cardio + Music Heart Rate Monitor
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes plastic body, 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
Plastic body, 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 off-gassing and allergens
TPE or rubber wristbands can emit volatile organic compounds (VOCs) during initial use and when heated, and may trigger contact dermatitis in sensitized individuals. No specific incidents documented for the Spark Fit, but sensitivity varies by user.
Bacterial growth in band crevices
The textured elastomer surface and moisture retention from sweat can harbor skin bacteria if not cleaned regularly. This is a hygiene concern rather than chemical toxicity but is relevant to device maintenance.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Plastic body degradation over time
Polycarbonate and ABS are stable under normal wear; no public record of the Spark Fit housing embrittling, cracking to release particles, or leaching monomers during typical use.
Heavy metals
The device likely complies with EU RoHS (Lead, Cadmium, Mercury bans), though TomTom has not explicitly certified this for the Spark Fit. Internal circuit boards are sealed and not in contact with skin or ingestible materials.
Source, FDA ↗Battery or charging contact corrosion
The Spark Fit's rechargeable battery and charging contacts are standard lithium polymer; no recalls or corrosion-related chemical leakage reported. Proper moisture drying after water exposure is standard care.
The full breakdown
What it's made of and why it matters
The TomTom Spark Fit uses a rigid plastic housing (likely polycarbonate or ABS) paired with an elastomer (rubber or TPE) wristband. Neither material class is known to leach BPA, phthalates, or heavy metals under normal wear conditions at room temperature. The sealed electronics enclosure and lack of any ceramic, enamel, or coated surfaces eliminates common toxicity vectors found in cookware or painted consumer goods. Elastomer bands can occasionally off-gas volatile compounds during manufacturing, but degradation during typical wrist-worn use is minimal.
The brand's record and disclosure
TomTom (Dutch navigation and sports tech firm) has not published specific chemical safety or materials disclosures for the Spark Fit line. No public PFAS statements, RoHS/REACH certifications, or third-party material audits are documented for this device. The brand has no recorded recalls tied to material toxicity, and user complaints in public forums do not highlight chemical concerns. Silent on materials transparency is common for mid-range fitness tracker manufacturers, but absence of reported harm does not equal testing.
How it compares in its category
Waterproof fitness trackers in this price tier typically use identical plastic and elastomer constructions with similar transparency gaps. Higher-end competitors (Garmin, Apple Watch) publish more detailed material disclosures and third-party safety certifications. Lower-cost trackers occasionally source elastomer from less-regulated suppliers, increasing off-gassing risk. The Spark Fit's lack of reported issues suggests material sourcing is comparable to mainstream fitness watch standards, though not exceptional.
If you buy it
Avoid prolonged exposure to direct heat (over 60°C/140°F) as elastomer bands can soften and off-gas more readily. If you have sensitive skin or known elastomer allergies, test the band on a small area first; some users report mild irritation from TPE formulations in budget trackers. Clean the band regularly with mild soap and water to prevent bacterial buildup in the textured contact surface. Replace the band if visible cracking, discoloration, or persistent odor develops, typically after 2-3 years of daily wear.
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
- TomTom 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.