Product Name: KN95 Face Mask with valve Color: White Number of Layer: 4 Layers Material: Non-woven Fabrics + Melt blown fabric +Electrostatic filter cotton + Nose bar + Mask band Style: Earloop Shape:Flat-fold Standard: KN95/FFP2 Particle Filteration Efficiency: â?¥95% Inhalation Resistance: â?¤350Pa Exhalation Resistance: â?¤250Pa Function: Anti-dust-smog-pollen Application : Personal respiratory protection Certificate: CE Certified / EN149:2001+A1:2009 / GB2626-2006 Packing Information: Grade:KN95 Carton size: 58.5*46*52cm Pacage: 480pcs/ctn (20pcs/box,24boxes/ctn) G.W.: 7.72kg Features: High filtration efficiency and low breathing resistance Adjustable nose clip Easy To Store Due To Fold Flat design