Brief:MATERIAL: Non-woven fabric+Melt-blown fabric+Non-woven fabric. MASK SIZE: 175mm*95mm FIT FOR: Civil Use WELL CONSTRUCTED: 1.Low Resistance,comfortable and breathable;Design of air vent in imitation of honeycomb; 2.Adjustable nose clip;Adjust for a better fit; 3.High elastic ear straps,comfortable to wear for a day; 4.Skin-friendly non-woven fabric,soft and hypoallergenic.