A dust mask, also known as a respirator, is a device that is worn over the nose and mouth to help filter out harmful particles from the air. Dust masks are designed to protect the wearer from inhaling dust, fumes, vapors, and other harmful particles that may be present in the air. They are used in various environments such as construction, woodworking, mining, agriculture, and also for general purpose.
Disposable masks are the most common type, and they are typically made of a non-woven material that can filter out particles as small as 0.3 microns. These masks are disposable and are intended for single use. Reusable masks, also known as half-mask or full-mask respirators, can be cleaned and reused multiple times.
It's important to choose the right mask for the task, as well as making sure it fits properly to provide adequate protection. Some dust masks have additional features such as valve for exhaling, that help to make breathing easier, or come with replaceable filters for extended use.
It's also important to remember that dust masks only provide a certain level of protection and are not designed to protect against all types of harmful particles. Additionally, dust masks should be used in conjunction with other safety measures, such as proper ventilation and safety goggles.