Fitbit · Waterproof Smart Rings & Bands
Qalo QRNT Smart Ring
Limited disclosure on materials. Waterproof smart ring raises coating concerns.
Qalo smart rings use silicone but do not disclose waterproofing treatment chemistry. Typical silicone rings for sports use water-resistant coatings that may contain PFAS, though not confirmed here.
The safe swap
Fitbit
Oura - Ring 5 - Smart Ring - Size Before You Buy with OR5 Sizing Kit - Size 11 - Silver - (2026)
85/100 safety
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Silicone elastomer with unspecified water-resistant coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
The Qalo QRNT uses silicone elastomer as its primary material, which is generally regarded as stable and non-leaching under normal wear conditions. However, the product includes an unspecified water-resistant coating applied to the silicone to achieve its claimed waterproof rating. This coating formulation is not publicly detailed by the brand, making it impossible to assess whether it contains fluorinated compounds (PFAS), other synthetic polymers, or additives that could migrate or degrade over time. Silicone itself is inert, but the coating's long-term integrity and composition are the critical unknowns.
The brand's record and disclosure
Fitbit (owned by Google) has a mixed track record on material transparency for wearables. The company does not prominently disclose coating chemistry or PFAS avoidance commitments for its accessories, including smart rings. No third-party certifications (such as OEKO-TEX or similar) are publicly associated with the Qalo QRNT. Given that water-resistant coatings on wearable electronics often historically relied on PFAS formulations, Fitbit's silence on this ingredient is a notable gap in disclosure.
How it compares in its category
Smart rings are a small, emerging category. The Qalo QRNT competes with titanium-based alternatives (like Oura Ring Gen 3) and other silicone rings with less emphasis on waterproofing. Most competitors do not disclose coating chemistry either, making category-wide comparison difficult. The Qalo's emphasis on water resistance without transparent coating disclosure is a differentiator that raises rather than lowers concern relative to simpler, uncoated silicone alternatives.
If you buy it
Wear the ring continuously as designed (it is meant for 24/7 use), but monitor the surface for cracking, peeling, or discoloration of the coating, which could indicate degradation. Avoid prolonged exposure to very hot water (above 60°C/140°F) or steam, as high heat may stress the water-resistant coating. Clean gently with mild soap and water; avoid solvents or harsh chemicals. Replace the ring if the coating visibly deteriorates, as a compromised coating may expose silicone or release unknown breakdown products.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Unknown water-resistant coating composition
Smart rings require water-resistant coatings, which have historically used PFAS or other synthetic polymers. Fitbit does not disclose what coating is used on the Qalo QRNT, leaving potential for fluorinated or other problematic additives.
Coating degradation and microparticle release
Continuous skin contact and moisture exposure can cause applied coatings to degrade over time. If the coating fragments or flakes, users may inhale or ingest microparticles of unknown composition.
Skin irritation from coating or silicone additives
Silicone elastomers often contain uncrosslinked oligomers or other additives to maintain flexibility. Continuous contact against skin, especially in warm/moist conditions (under the ring), could cause localized irritation in sensitive individuals.
Leachables from silicone base material
Medical-grade silicone is generally stable and non-leaching; no reported cases of migration from silicone smart rings have been established in public records.
Heavy metal contamination in electronics or connectors
The Qalo QRNT contains minimal electronics (sensors, battery) housed within the ring. No recalls or reports of heavy metal exposure from this model are publicly documented.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Waterproof Smart Rings & Bands
Fitbit
Oura - Ring 5 - Smart Ring - Size Before You Buy with OR5 Sizing Kit - Size 11 - Silver - (2026)
Titanium and stainless steel with glass sensor
Lower concern smart ring; no PFAS-prone materials identified.
⚠Brand says nothing about PFAS
Fitbit
Qalo QRNT Slim Smart Ring
silicone elastomer with metal core
Smart ring with silicone body; lower concern but no public PFAS disclosure.
⚠Brand says nothing about PFAS
Withings
Black Smart Ring Size 9 - New Women | Color: Black
Titanium alloy ring with sapphire crystal display
Lower concern. Smart ring materials inherently unlikely to require PFAS.
⚠Brand says nothing about PFAS
More waterproof 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.