When wearing a respirator that requires a seal with your face, you must be clean shaven where the respirator seals with your face. This helps to make sure your respirator can protect you from breathing contaminants. Please ensure that you are clean shaven prior to the fit test.
You must have shaved before the start of your shift. You may need to shave again during your shift or prior to the fit test if your beard grows quickly enough to interfere with the respirator's seal.
Stubble prevents the mask from forming a good seal with your face. Stubble may seem small, but its a huge when compared to dust, mist, fibers, fume particles and gas vapors. Stubble under a respirator seal creates plenty of room for these contaminates to enter your mask.