KN95 is a Chinese standard respirator, conform to the standard of GB2626-2006, its detection method is the same as the United States, and it is suitable for filtering non-oily particulate matter.KN95 and N95 are actually the same in terms of particle filtration efficiency. Product Specification: MaterialHigh quality PP nonwoven outside KN95 Melt blown filter face mask High efficiency electrostatic filter cotton High quality PP non woven inside Layer4 PLY layer StyleFoldable with ear loop ApplicationDust proof, PM2.5, bird flu, virus, smog, vehicle exhaust,pollen, particulate etc Package50pcs/box , 2000pcs/ctn Executive StandardGB2626-2006 StandardDisposable Respirator factory website:http://www.chuandatech.com/disposable-respirator/