... face mask 2.weight:20+25+20gsm 3.specification:17.5*9.5cm face mask Specification:1, Matreial : 3ply 20GSM PP+ 20GSM ... filter+25GSM2,Size: 17.5*9.5cm(for adult) 14.5*9.5cm(children)3,Color: white, blue ,green4,Packing ... , ordorless2,fiberglass free with tie3,No irritating to skin4,Permits air passage and breathable5,In labs ,hospital, factories for blocking liquid ...