4 layer KN95 mask: Non-woven fabric, with anti-splash function, effecttively prevent inhalation of droplets and water vapor; Melt-blown fabric, electrostatic adsorption, filter PM2.5 haze and dust4; Heat preservationï¼?it is warm, soft an breathable; Non-woven fabric, with anti-splash function, effectively prevent inhalation of droplets and water vapor. Material: 4 layer Size: 16.5X10.5X0.2 cm Feature: anti-virus / prevent flu / anti somke / dust Color: White Size: Adult size Packing: 2pcs/bag, 50pcs/box,10 boxes/carton, cartons size:29*31*67cm, 0.06cubic meter/carton, 4.2kg/carton