Fit test

A fit test checks whether a mask, such as a respirator, properly seals to your face, ensuring it effectively filters airborne particles. During the test, a harmless aerosol or smoke is introduced around the mask while you wear it. If the mask fits well, the particles won't leak inside. It’s a crucial step to confirm that the mask provides the intended protection, especially in environments with dust, fumes, or pathogens. Proper fit testing helps prevent exposure by ensuring the mask suits your face shape and size, promoting both safety and comfort.