KN95 Masks IN NIGERIA BY SCANTRIK MEDICAL SUPPLIES 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 from dust, PM 2.5, haze, smoke, automobile