3pcs 1Set, Air+ N95 Men Women Kids Health Haze Mask, PM2.5 Dust Filtet, Adjustable Straps, Baby Kids Face mask, Haze Dust Plaster (Medium 3.9 x 5.3 inch) N95 Health Haze Mask 3pcs 1Set Dust Plaster Mosquito/Block PM 2.5 95%, 0.3um 98.8% filtration Air masks PM2.5 particles, giving a hazardous air pollutant in the fog, ash and viruses, blocking more than 95% This is a functional mask that not to inhale exhaust heat, moisture and carbon dioxide accumulating again. It is ergonomically designed to give off the air to the outside. There is a nose-rest cushion handle provides a comfortable fit.