Ultra-fine filter layer effectively prevents. PM2.5 particles from enteringPM 2.5 filtration with an efficiency rate up to 95%. Non-woven fabric for safe filtering, soft fabric, breathable, comfortable. Filters out dust, bacteria, smoke & pollen5 Layers of protection. FFP2 Protection. Anti-infection. PFE≥95%. BFE≥95%”If you are looking for top quality and affordable KN95 Mask, then this McCons KN95 Mask is the best choice for you. This mask is made with 5 layers that effectively prevent PM2.5 particles. It helps to keep safe with Filters out dust, bacteria, smoke & pollen.