1. healthy and unexpensive 2.withoutstanding quality 3.used in all kinds of virus protecting Active carbon face masks(4-ply)Material: first ply pp fabric 20g Second ply active carbon paper 35g third ply filter paper 20g forth ply pp fabric 20g Size : 17.5*9.5 cmColor: blue, green, whitePacking: 50pcs/box , 40boxes/cartonMeas: 52*38*42cm Features:1) Non-woven material2) With elastic ear-loop or ...