In reply to Billy the fish:
> (In reply to Yrmenlaf) I’d ask the organiser, they may let you keep your beard. Apparently, stubble is stiff enough to break the seal but longer hair is soft enough to flatten and seal. The mask will be under positive pressure so any leaks will be clean air escaping and not unwanted stuff getting in. If you’re only likely to use briefly for emergency escape that shouldn’t be a problem.
Depends what course he's doing. If it's full BA he'll be doing the various leak and breath-down tests, which rely on getting a decent face seal. Apparently a smear of vaseline on the beard will do the trick...
But as you say, ask the course organiser.