KN95 mask has 5 layers of filtration, the first layer is added with soft non-woven fabric to rent dust, odor and harmful particles, the second layer of hot air cotton to strengthen the filtration of fine particles, the third layer of melt-blown cloth filtration layer, limited filtration of particles 0.5 micron. The fourth layer of melt-blown cloth filter layer, effective filtration 95%, the fifth layer of skin-friendly non-woven fabric, moisture-proof, breathable and filter the missing dust
