A respirator is a personal protective device designed to protect the wearer from breathing in harmful substances, such as dust, smoke, fumes, and chemicals. Respirators come in various types, including disposable masks, half-face masks, full-face masks, and powered air-purifying respirators (PAPRs). These devices work by filtering out harmful particles and/or providing a supply of clean air for the wearer to breathe. Respirators are commonly used in industries such as construction, manufacturing, and healthcare, where workers may be exposed to hazardous substances. Proper selection and use of a respirator are crucial for its effectiveness in protecting the wearer from harmful exposures.