How about using a full face ski mask and breathing through the fabric or something like that? Maybe that plus a filter, silly, might look like darth vader but what the heck. One of my biggest fears in life is losing the ability to ride a bike. Strange as that might seem. I had knee problems, first thought was, what if it keeps me from riding? I see people who are paralyzed or blind and think, they cant ride a bike!
Guess im weird. Hope she figures something out because not riding would suck.