This product is a disposable surgical mask, three layers of non-woven cloth, belongs to the second level, after disinfection, can effectively block bacteria and dust. Material: 1st layer: 20gsm PP non woven 2rd layer: 25gsm filter paper, BFE>99% 3th layer: 27gsm PP non woven( ES material available) Size: Adult: 17.5*9.5CM Child: 14.5*9.5CM Regular Packing : 50pcs/box, 2000pcs/ctn