mask with valve 1, soft fabric, cut uniform, wear comfortable 2,pleasing in appearance N95 round valve mask Packing: 20pcs ... strong electrostatic filter layer,effective filtrationof solid particles, dust, spreading oily liquidmist.Adjustable nose clip, built- ... ,cement,textile, disintegration of engineering, cutting dust, heavymetals andharmful pollutants, glass, hardware, gardening, etc.