miuphro kn95 face mask, 5-layer design cup dust safety masks 50 pack white miuphro 【the filter efficiency more than 95%】our kn95 mask is made of 2 non-woven outer layers, 2 melt-blown inner filter, 1 non-woven cotton middle layer, offers more protection than a standard disposable 3-ply mask. the filter efficiency is 95% greatly keeping you safe, etc