... 50pcs/bag 2000pcs/ctnThe 4 ply active carbon facemask is composed of PP nonwoven cloth on ... melt-blown non woven cloth. This kind of facemask is odorless, can filtrate bacteria, dust, micro granules ... used in hospital,home,electric area.active carbon facemask is composed of PP nonwoven cloth on ... melt-blown non woven cloth. This kind of facemask is odorless, can filtrate bacteria, dust, micro granules ...