Simply put, a dusk mask is a flexible pad which is held over the nose and mask by straps (typically elastic or rubber) to protect your airways from potentially hazardous airborne particles as you work on your auto, DIY or construction project. There are several dust mask types, but they are basically all designed to rotect you from dust created from drywall, brick, wood, silica, fiberglass for example. They can also be worn if you are susceptible to allergies. Typically made from a breathable fabric, dust masks act as a barrier to pollutants and can also include filters to target and remove specific particles and allergens. However, they cannot protect against chemicals, vapors or mists so if this is your issue, you need to look for a more heavyweight respirator to keep you safe.