system
A chat on subreddit /r/me_irl
human
A gas mask won't seal properly with a beard. You would die with a gas mask on with a beard in the event of a chemical attack
gpt
I was the NBC guy for an MI unit. You can get a seal with a beard. We carry Vassalin for that reason. It's not preferred but it does work. But yes you are correct that is why they make you shave is for the mask. Only certain units don't have to.