Fitbit · Water-Resistant Smart Rings & Bands
StrapsCo Pattern Comfort Stretch Band for Fitbit Charge 6
Lower concern. Material as recorded is not linked to PFAS.
The stretch fabric blend has no water-repellent finish on record. The brand has no PFAS statement on record for this product.
The better-graded swap
Oura
Oura 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
Elastane/spandex blend stretch fabric
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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.
Formaldehyde / VOCs
Elastane blend fabrics may be treated with formaldehyde-based dyes or wrinkle-resist finishes during manufacturing. Fitbit does not disclose finish specifications; formal testing would be required to confirm presence or absence.
Source, ATSDR ↗Azo dyes (synthetic colorants)
The colored pattern weave likely uses azo dyes, which are standard in affordable textiles and may include aromatic amines. No OEKO-TEX or restricted substance list compliance is claimed by Fitbit for this product.
Antimony in polyester base fibers
If the base layer is polyester, antimony trioxide (a catalyst used in polyester synthesis) may be present at trace levels. Direct skin contact with band materials poses minimal risk, but new straps may release trace antimony; initial hand wash is prudent.
Microplastic shedding during wear and wash
Elastane and polyester fibers shed microfibers during washing and prolonged friction. This poses no acute toxicity to the wearer but contributes to environmental microplastic load with each laundry cycle.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Allergic contact dermatitis from elastic or dyes
No specific dermatitis complaints are documented for StrapsCo or Fitbit bands in this material class, but individuals with sensitive skin or latex cross-reactivity should test on a small patch first.
The full breakdown
What it's made of and why it matters
This band is elastane (spandex) blended with likely polyester or nylon base fibers, a standard construction for wearable stretch accessories. Elastane itself is not a material linked to PFAS and does not require water-repellent coatings, unlike some technical fabrics. The blend design allows comfort and durability without relying on chemical treatments that introduce common textile hazards. No water-repellent coating (water-repellent coating) coating has been detected on this product line.
The brand's record and disclosure
Fitbit (owned by Google since 2021) has maintained a quiet stance on PFAS in wearable accessories and has not published specific transparency reports for band materials. The company offers no public certifications (Bluesign, OEKO-TEX, GOTS) for this product, suggesting routine commercial textile supply rather than third-party verified sourcing. No recalls or safety incidents tied to this specific strap model are on record. Fitbit's silence on textile chemicals is typical for accessory manufacturers but limits independent verification.
How it compares in its category
Elastane-blend replacement bands have lower concern for smartwatch straps because they avoid coating-dependent water resistance and complex chemical finishes. Most competitors (Garmin, Apple, Samsung third-party makers) use similar elastane blends, making this materially unremarkable and lower concern by category standards. The absence of branded certifications is routine for budget-tier wearable accessories and does not indicate elevated risk relative to peers. Silicone or rubber alternatives eliminate some chemical concerns but offer less comfort and breathability.
If you buy it
Hand wash in cool water with mild soap and air dry; elastane degrades under heat and direct sunlight, so avoid hot water and prolonged sun exposure. Check the seams and elastic tension every 6-12 months; once stretch becomes loose or stitching separates, replace the band to avoid skin irritation from sweat trapping. Store in a dry place away from chlorine (pools, bleach) and fragrant lotions, which can degrade elastane over time. If you develop skin sensitivity or itching, switch to a silicone alternative and contact Fitbit support if the reaction persists.
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
- Fitbit 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.