Xiaomi SmartMi PM2.5 Anti-haze Mask comes with high-efficiency filtration of 5-layer filter material, environmentally-friendly polyurethane sponge material, preliminary filtration of large particle impurities such as pollen. PM2.5 filtration efficiency is over 97pct. It features 3D split vault skeleton, even breathing even if you exercise. The large diameter cold flow breathing valve for smoother air circulation. Ultra-thin silicone valve, sensitive rebound, high airtightness. Double-layer melting HEPA, superfine fiber stacking, blocking oily particles and bacteria. TPU elastic film composite superfine sponge is more comfortable. It has no warranty.
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