Properties:Medical Materials & Accessories Name:PM2.5 Disposable 99% filterability 4 ply carbon face mask filters material:nonwoven fabric / pp size:17.5x9.5CM ply:1ply , 2ply ,3ply ,4plyetc color:white, blue, green, pink, yellow,Violet style:with earloop / tie elastic:round / flat apply::Hospital , food industry , catering Characteristics::anti dust virus , high filtration Certificate::CE ISO FDA Show More