Xiaomi Smartmi PM2.5 Anti-Haze Mask – Black

• PM2.5 filtration efficiency is over 97pct
• 3D split vault skeleton, even breathing even if you exercise
• Large diameter cold flow breathing valve for smoother air circulation
• Ultra-thin silicone valve, sensitive rebound, high air tightness
• High-efficiency filtration of 5-layer filter material, environmentally-friendly polyurethane sponge material, preliminary filtration of large particle impurities such as pollen
• Double-layer melting HEPA, superfine fiber stacking, blocking oily particles and bacteria
• TPU elastic film composite superfine sponge is more comfortable