Masks have a certain filtering effect while the air entering the lungs. When respiratory infectious diseases are prevalent or working in dust and other polluted environments, wearing masks has a very good effect. GOODSELLER provides three-layers disposable face masks, medical face masks, surgical face masks, KN95 masks, KN94, cup masks and so on. All of the face mask we supply are in strict accordance with international standards and have passed CE and FDA certification. What's more，These masks are designed to fit over the nose and mouth of the wearer, and properly fitted can provide excellent protection. To help prevent cross contamination and protect the user from inhaling fine particles.