Originally Posted by
Ewan Whosearmy
212Man, not sure that Bob works for the same Air Force as you...
On a practical note, does the beard interfere with the fit of the mask, especially if pressure breathing is active?
Not completely, if the attached photo of BV's Doppelgänger is anything to go by
https://www.nationalgeographic.com/h...s-alphabet-spd 
Jack