Polar · Waterproof Smart Rings & Bands
Unisex Health Tracker Smart Ring
Minimal public transparency on materials and coatings.
Polar does not disclose PFAS-related material details for this smart ring. Waterproof electronics typically use water-repellent coating treatments that may contain PFAS, but Polar provides no confirmation either way.
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
Stainless steel body with unspecified waterproof 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 Polar Health Tracker Ring uses a stainless steel body, which is generally inert and biocompatible for skin contact. The critical unknown is the waterproof coating applied to achieve water resistance; Polar has not publicly disclosed whether this uses Teflon-type coating (Teflon-based), silicone, polyurethane, or another polymer. Coatings can degrade with wear and thermal stress, potentially exposing underlying material or releasing particles. Stainless steel itself does not typically leach heavy metals under normal skin-contact conditions, but the coating composition directly affects long-term safety.
The brand's record and disclosure
Polar is a Finnish sports-tech company with a strong reputation in wearable fitness devices. However, there is no public statement from Polar specifically addressing PFAS use in their coatings or manufacturing processes, nor do their product materials disclosures typically detail waterproofing agents. No major safety recalls or chemical hazard controversies have been established for Polar wearables in the public domain. The company's silence on coating chemistry is notable given industry-wide scrutiny of PFAS in water-resistant consumer products.
How it compares in its category
Smart rings and wearables typically use similar stainless steel or titanium bodies with waterproof coatings; Polar's approach is standard for the category. Unlike textiles or cookware, wearables pose lower acute leaching risk because they contact only skin and are not ingested or heated. However, they offer less regulatory oversight than food-contact items, so manufacturer transparency gaps are more common. Competitors (e.g., Oura, Samsung Galaxy Ring) also avoid detailed coating disclosure, making this a sector-wide transparency issue rather than a Polar-specific weakness.
If you buy it
Inspect the ring regularly for visible cracks, peeling, or discoloration of the coating, particularly around the edges and clasp area. Avoid prolonged exposure to harsh chemicals (chlorine, solvents) and extreme heat (saunas above 65 C or steam rooms), which can accelerate coating breakdown. Rinse the ring with fresh water after swimming or contact with salt water to prevent corrosion and coating stress. If the coating shows significant damage (flaking, exposure of underlying metal), discontinue use and contact Polar support, as the structural integrity and waterproofing will be compromised.
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.”
Waterproof coating composition and degradation
Polar does not publicly specify whether the waterproof coating contains Teflon-type coating, polyurethane, silicone, or other polymers. Degraded or flaking coatings could expose bare stainless steel or release polymer particles; risk is low under normal wear but increases with mechanical stress or heat exposure.
Skin sensitization from stainless steel or coating
No recalls or documented widespread skin reactions to Polar Health Tracker Ring have been reported. Stainless steel is generally hypoallergenic, but individual nickel sensitivity in some steel alloys could cause contact dermatitis; manufacturer does not specify alloy composition.
Microplastic release from coating wear
If the waterproof coating is polymer-based, mechanical wear from daily contact with skin, clothing, and surfaces could generate small polymer particles. Ingestion risk is low, but inhalation during removal or cleaning is theoretically possible if coating is visibly flaking.
Leaching from adhesives or soldering in battery compartment
No public information on adhesives or solder composition in the sealed battery chamber. Modern wearables typically use biocompatible epoxies, but disclosure is absent. Risk is minimal because the battery compartment does not contact skin directly.
PFAS in waterproofing (unconfirmed exposure pathway)
Waterproof coatings on wearables often use fluorinated polymers (Teflon-type coating, PFC-based hydrophobic treatments) to achieve durability. Polar's silence on this means PFAS exposure cannot be ruled out; skin absorption risk is low, but inhalation during manufacturing and disposal are concerns.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 35% 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.