... Product discription:Two-story, three-layer, four-layer non-woven mask, used in medical, food, electronics and other industries as ... materials, it can filter more than 95% of bacteria, dust, harmful gases, meet the exporting quality standard. Supre quality ... and double) fits to the nose flexiblyTie fits to the face comfortablyLatax freeDifferent colors, different sizes, different packing are available ...