I think wearing a gas mask is taking things to a little too advanced level ... I got enough of wearing (and running with!) them in the army. Really, why would anyone sane want to wear a gas mask ... ?! Perhaps I'm just too old *grin*
I got an old throwback Yugoslav army gas mask that saw action in Herzegovina in the 90s. I don't really wear it out unless I am severely fucked up and am in a stage 5 crazy mode. I've never washed it, and I think it still has some chemical residue on it from the 90s because it hurts my damn eyes. Oh well.