Posted on NIOSH Science Blog 

“So, you want to grow out your beard, but wear a tight-fitting respirator at work? Ensuring the respirator seal is a vital part of respiratory protection practices. Facial hair that lies along the sealing area of a respirator, such as beards, sideburns, or some mustaches, will interfere with respirators that rely on a tight facepiece seal to achieve maximum protection. Facial hair is a common reason that someone cannot be fit tested.”

Visit NIOSH to view helpful resources: https://blogs.cdc.gov/niosh-science-blog/2017/11/2/noshave/