Xiaomi · Waterproof Fitness Trackers & Cases
Xiaomi Smart Band 8
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes silicone band, stainless steel case, AMOLED display, 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
Silicone band, stainless steel case, AMOLED display
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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.
Nickel leaching from stainless steel case
Stainless steel alloys typically contain 8-12% nickel. While corrosion-resistant in normal conditions, individuals with nickel contact dermatitis may experience localized reactions if the case contacts skin directly for extended periods. No specific nickel release data for the Smart Band 8 case is publicly available.
Microplastics
Extended UV exposure or repeated mechanical stress can cause surface cracking in silicone, potentially generating microparticle shedding. The extent and toxicological significance of silicone microparticle exposure through skin contact remains understudied. Proper maintenance and timely replacement mitigate this risk.
Source, EPA ↗What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Silicone band skin irritation and sensitization
Silicone itself is hypoallergenic and inert, but residual processing chemicals, mold-release agents, or trapped sweat bacteria pose low-level irritation risk rather than toxicological hazard. No recalls or widespread complaints have been reported for the Smart Band 8 band.
Heavy metals
AMOLED displays use organic light-emitting compounds and may contain trace metals (cadmium, lead, mercury) in phosphor layers. Direct skin contact with the display is absent by design, eliminating a primary ingestion or absorption pathway. No documented leaching from sealed Smart Band 8 displays has been reported.
Source, FDA ↗Adhesive or sealant off-gassing from casing assembly
Epoxy or polyurethane adhesives used to bond case components may emit volatile organic compounds (VOCs) when new. This off-gassing is minimal after the initial 24-48 hours of unboxing and poses negligible risk during skin-contact wear, given the small surface area and distance from respiratory intake.
The full breakdown
What it's made of and why it matters
The Xiaomi Smart Band 8 uses a silicone elastomer band paired with a stainless steel case and AMOLED display. Silicone is a synthetic polymer with very low chemical reactivity and minimal leaching risk under normal skin contact and temperature conditions. Stainless steel (primarily nickel-chromium alloy) is corrosion-resistant and unlikely to transfer heavy metals into sweat or skin oils under typical daily wear. The closed AMOLED display is sealed and does not contact skin directly, eliminating ingestion pathways for display materials.
The brand's record and disclosure
Xiaomi does not publicly disclose material safety certifications or chemical compliance statements specific to the Smart Band 8 or its wearable accessories. The company has not faced major recalls or documented chemical safety scandals tied to this product line. Independent testing data for chemical leaching from Xiaomi wearables is sparse in public literature, so safety claims rest primarily on material class reputation rather than brand transparency.
How it compares in its category
Fitness tracker bands most commonly use silicone, thermoplastic polyurethane (TPU), or fluoroelastomer (FKM). Silicone presents lower concern for phthalate contamination compared to some lower-cost TPU alternatives. Stainless steel cases are standard across premium and mid-range trackers and carry minimal leaching risk compared to painted or plated finishes. The Xiaomi Smart Band 8 sits in the middle-of-the-road material profile for this category, neither exceptional nor alarming.
If you buy it
Rinse the silicone band regularly with soap and water to remove sweat residue and reduce skin irritation potential, especially if you have sensitive skin or nickel sensitivity. Avoid prolonged immersion in hot water (above 50C) beyond the manufacturer's IP rating specifications, as this is outside intended use. Replace the band if silicone shows visible cracking, hardening, or discoloration, as degradation could increase surface irritant potential. The stainless steel case requires no special maintenance beyond occasional dry wiping.
What we don’t know
- Basis
- Model estimate, 45% 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.