Reusable and Washable PM2.5 Mask w/ Filter

The PM2.5 mask soft with moisture filter, adds a comfortable feel to the usual protection the face mask offers in dust, smog and haze polluted areas. Tiny particles smaller than 2.5 micrometers in diameter, which is about 3% the diameter of a human hair, are blocked out. These masks are used for traveling, hiking, or when visiting polluted areas. The best mask to prevent air pollution are PM2.5 face masks. Mask is Machine Washable