Before a fit test, what requirement is there regarding facial hair?

Before a fit test, the requirement concerning facial hair is that employees must be clean-shaven to ensure a proper seal between the respirator and the face. The presence of facial hair can interfere with the respirator's ability to maintain a tight fit, which is crucial for the effectiveness of respiratory protection.

Having any facial hair, including a mustache, can compromise the fit. A clean-shaven face allows for the best possible seal, ensuring that the respirator works effectively to protect the employee from airborne hazards. Therefore, the requirement for employees is to be completely clean-shaven to achieve accurate fitting results during the fit test.