... 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 ... test.Aluminium strip( single and double) fits to the nose flexiblyTie fits to the face comfortablyLatax freeDifferent colors, different sizes ...