Disposable surgical mask 1.material:PP nonwoven 2.Size:17.5* ... ,white,green 4.Certificate:ISO,CE,FDA,GOST PP 2-ply face mask, elastic typeColour: White, Red, Blue, Green, Yellow, GerySize: ... and so on.Material:Face mask is makde of PP nonwoven,Regularly it is 3 ply.The outside ply is made of ... filter in the center.Th inside ply is also make of 20Ggsm PP nonwoven. Disposable non-woven PP 2-ply face mask