Xiaomi · Waterproof Smart Rings & Bands
2025 New! Xiaomi Smart Ring for Men & Women. Tracks Heart Rate, Blood Oxygen, Sleep. 5ATM Waterproof Fitness Tracker Pin
Skip. Waterproof ring with undisclosed coating and no PFAS transparency.
This smart ring claims 5ATM waterproofing but provides no material or coating details. Waterproof electronics typically use water-repellent coating treatments that may contain PFAS, and Xiaomi offers no disclosure or testing data.
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
Metal alloy ring 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 Xiaomi Smart Ring uses a metal alloy band (composition unspecified in public materials) with an undisclosed waterproof/water-resistant coating to achieve its 5 ATM rating. Metal alloy rings commonly use nickel-containing stainless steel or titanium; nickel leaching is a known concern for wearables in direct skin contact, particularly for people with contact dermatitis. The waterproof coating is the hazard flashpoint: such coatings often rely on fluorinated compounds (PFAS) for durability, but Xiaomi has not disclosed the coating chemistry, making independent assessment impossible.
The brand's record and disclosure
Xiaomi does not publish chemical composition, coating formulations, or PFAS use policies for wearables in publicly available safety documentation. The company has no established third-party safety certifications (e.g., CPSIA, REACH compliance statements) widely accessible for this product. No recalls or safety incidents specific to the Xiaomi Smart Ring have been documented in major consumer safety databases. This silence on materials is a red flag for a wearable in prolonged skin contact.
How it compares in its category
Smartwatch rings compete on miniaturization and durability; Xiaomi's approach prioritizes thinness and waterproofing without disclosing the chemical cost. Competitors like Oura Ring (titanium, undisclosed coating) face similar transparency gaps, but some brands (e.g., Samsung Galaxy Ring) publish material safety summaries. Xiaomi's lack of disclosure is more opaque than many mainstream fitness wearable makers. Metal alloy rings are lower-risk than silicone bands for phthalate or BPA leaching, but the coating remains the unknown.
If you buy it
Remove the ring daily and inspect skin for redness, itching, or dermatitis; these may signal nickel sensitivity or coating degradation. Do not wear during intense sweating or prolonged water immersion beyond the stated 5 ATM depth, as this accelerates coating breakdown. Clean with a soft, dry cloth; avoid harsh soaps or solvents that may degrade the protective coating. Replace the device if the coating shows visible wear, peeling, or discoloration, as this can expose the underlying metal alloy.
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.”
Nickel leaching from metal alloy
Metal alloy composition is unspecified, but stainless steel and titanium alloys used in rings often contain nickel. Direct skin contact over 24 hours daily increases leaching risk for sensitized individuals, potentially causing contact dermatitis.
Undisclosed waterproof coating (possible PFAS)
5 ATM waterproofing typically requires fluorinated polymer or silicone-based coatings; Xiaomi has not disclosed which. PFAS-based coatings are common in durable wearables but carry bioaccumulation and environmental persistence risks.
Coating degradation and flaking
No long-term durability data published for the Xiaomi ring. Thin coatings on metal rings are prone to wear; flaking coating fragments could be ingested or inhaled, though risk is low given product design.
Electronic components and battery (off-skin risk)
No specific hazards from the ring's internal electronics have been documented. Standard smartwatch battery safety protocols apply; device should not be disassembled by users.
Allergic reaction to coating or adhesives
Some users may experience localized skin reactions to undisclosed coating chemistry or adhesive residues; sensitivity testing before extended wear is prudent for individuals with sensitive skin.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 32% 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.