... :Blue,white,green 4.Certificate:ISO,CE,FDA,GOST PP 2-ply face mask, elastic typeColour: White, Red, Blue, Green, Yellow, GerySize ... ,GOSTUseage:can be used in hospital,cleanning room,food making and so on.Material:Face mask is makde of PP nonwoven ... ,Regularly it is 3 ply.The outside ply is made of 20gsm PP nonwoven.And it is 25 gsm filter in ...