... 21x9cm 2,Color:white/blue/green/red/pink 3,Material:polypropylene spunbond. 3 ply face maskType: Adult face mask, Children face ... , Melt blown 20gsm,, PPSB 20gsm Ear-loop type: 3-ply polypropylene cloth, low breathing resistance and high filtration efficiency.Mini ... , while outer cover is water resistant.Tie-on type: 3-ply polypropylene cloth, low breathing resistance and high filtration efficiency. ...