✅ McCons KN95 Mask, GB2626-2006 It comes with Ultra-fine filter layer effectively prevents PM2.5 particles from entering. PM 2.5 filtration with an efficiency rate of up to 95%. Non-woven fabric for safe filtering, soft fabric, breathable, comfortable. Filters out dust, bacteria, smoke & pollen. Material : Non woven fabric, Hot air cotton, Melt blown fabric.