This product adopts medical grade HEPA filter, removal efficiency of PM2.5 particulate up to 99%. The HEPA filter is characterized by the fresh air can goes through, however, tiny particles cannot pass through. PP(polypropylene) sterilizing filter, is good for bacteria and viruses inhibition and decomposition. Activity carbon filter can effectively filter odor. Built in mini supply fan to offer activate air can greatly reduce respiratory resistance. Three speeds control offer different air volume, completely solve the stuffiness and humidity problem of the traditional mask. Skin‐friendly medical material, ergonomic design, perfectly fit for face, easy to clean, does not affect normal communication when wearing.