Protective masks are divided into air-supply protective masks and filter-type protective masks. Air filter masks can filter particles in the air, and block droplets, blood, body fluids, toxic gases, and secretions. Air-supply protective masks refer to air-supply protective masks in chemical factories, fire sites, or military chemical hazards, which are ordinary individual soldier protective masks.
Dust mask, personal protective device to prevent or reduce dust in the air from entering the human respiratory organs. Dust masks are personal protective equipment designed to prevent or reduce dust in the air from entering the human respiratory organs to protect life.