... 3,Material:polypropylene spunbond. Active carbon face maskType: Adult face mask, Children face mask, Baby face mask Ear-loop , with tie onBFE: 95%, 99 ... /o antifog plastic, single or double noseLayer: 1ply, 2 ply, 3ply, 4plyMaterial: PPSB 25gsm, Melt blown 20gsm,, PPSB 20gsm ... outer cover is water resistant.Tie-on type: 3-ply polypropylene cloth, low breathing resistance and high filtration efficiency. ...