KN95 Standard Dust-Proof Mask can effectively filter 95% of the air Oil-free particles, help prevent Coronavirus and pm2.5 air pollution, suitable for home and professional use, making your indoor and outdoor breathing easier. 4-Layer Filtration, Excellent Protection. These masks are vacuum sterilized and made of the highest quality materials. Our masks are comfortable, soft on the skin, non-toxic and non-irritating. Our comfortable fitting mask will not rub your face, will reduce the viral infection in a crowd, is light and non-bulky and fabric-based with comfortable wear elastic earloops. When worn correctly, you will benefit from comprehensive protection. The soft earloops on both sides are elastic to fit various face shapes and sizes. Box of 50 pcs.