Xiaomi · Waterproof Fitness Trackers & Cases
Xiaomi Smart Watch Fitness Tracker, 1.47'' TFT Display, 21-Day Battery Life, 50 Fitness Modes, 50m Water Resistant, Smar
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes unspecified polymers, likely silicone and stainless steel band; 50m, 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
Unspecified polymers, likely silicone and stainless steel band; 50m
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Xiaomi Smart Watch Fitness Resistant, Smar is made of, ingredients and materials
This watch combines a silicone band (common in fitness trackers for skin comfort and durability) with a stainless steel case and a TFT display module. Silicone does not leach plasticizers or BPA under normal wear conditions, and stainless steel is chemically inert. The TFT display itself is sealed within the device and poses no direct exposure risk. No conformal coating, adhesive resins, or topical treatments are specified in the product documentation.
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.
Water resistance seal failure and bacterial/mold growth
The 50m rating depends on gasket and seal integrity, which can degrade after 1-2 years of use or after accidental submersion beyond design limits. If seals fail, water ingress may trap moisture internally, promoting microbial growth in unsealed crevices; this is a maintenance issue, not a material toxicity concern.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Silicone degradation and sweat interaction
Medical-grade and consumer-grade silicones are chemically stable under normal skin contact and do not leach harmful compounds at body temperature. No adverse events or contamination have been reported for Xiaomi fitness trackers due to band material.
Heavy metals
Stainless steel used in watch cases is regulated and does not release nickel or chromium under normal wear. Solder joints inside the sealed device are not in contact with skin or sweat and pose no known ingestion or dermal absorption risk.
Source, FDA ↗Electronic component outgassing (conformal coatings, epoxies)
No conformal coating is disclosed for this model. Consumer electronics do not typically off-gas volatile organics at wrist-level wear distances; sealed devices minimize vapor exposure.
Allergic contact dermatitis from band material or adhesives
Silicone is hypoallergenic and rarely triggers contact dermatitis in the general population. No recalls or widespread complaints have been reported for this model's band material, though individuals with confirmed silicone sensitivity should patch-test before extended wear.
How is this PFAS grade calculated?
The brand's record and disclosure
Xiaomi does not publish detailed material safety data sheets or chemical transparency reports for consumer electronics at the product level. The company has not made public commitments to PFAS phaseout in wearables, and no third-party certifications (such as bluesign, Oeko-Tex, or similar) are listed for this model. This reflects standard practice in the mass-market fitness tracker segment rather than a specific red flag.
How it compares in its category
Fitness trackers in this price and feature range typically use silicone bands and polymer housings with minimal chemical disclosure. This Xiaomi model's material profile (silicone + stainless steel) is more stable than lower-cost alternatives that may use lower-grade plastics or unknown elastomers. The 50m water resistance relies on seals and material selection, not surface coatings, which reduces off-gassing risk common in coated devices.
If you buy it
Clean the band regularly with mild soap and water to prevent skin irritation from sweat or cosmetic product buildup; silicone is durable but can absorb odors and stains over time. Do not expose the device to prolonged direct heat (saunas, steam rooms) or solvents, as these can degrade seals. The battery is non-user-replaceable; plan for device replacement in 2-3 years as typical for this category. Avoid storing it in airtight bags when damp, as trapped moisture may corrode the stainless steel case over extended periods.
What is not known about PFAS in this product?
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Xiaomi 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.