People who work in dirty environments need good face masks to keep dust out of their nose and mouth. Without one, they are in danger of inhaling potentially harmful microparticles. Wearing a face mask can also prevent a person from spreading diseases to those around them. When we cough or sneeze, we send germs into the air. But these masks will keep most of the particles from going into the air. Cheap face masks are available at wholesale prices. Buy some extra boxes to make sure you have them on hand when you need them. They are especially important for schools, or any place where there are large groups of people.