I commute so I'm on my bike for significant periods of time, consistently from week to week. When pollen struck Georgia, it occurred to me that I'm inhaling a lot of crap despite my full helmet - pollen, exhaust, etc. I've got a bad cough right now as a matter of fact. Does anyone wear a mask or some kind of filter when they ride? Would a surgical mask or the like even be worth the trouble.. even filter anything when the wind from riding is slamming it?