Sorry for jumping in, but this is related to lens..
couple of questions:
1) is it possible to use a snowboarding goggle (like this) for drifting (cars) and snowboarding, or will they break from the shit that flies at you in drifting?
2) this is because at night it is near impossible to wear sunnies (clear/low light lens is needed) and i want to interchange them to ones which i can wear boarding...
3) if q1/2 go well, what is the best IO/S lens for night driving? (clear yea?)
I dunno about using the I/Os for drifting/driving. I have no experience doing this, but from what you're saying (shit that flies at you) I wouldn't get the I/Os for that type of activity. The I/Os are GREAT goggles but if you're getting peppered by shrapnel they're gonna get scratched real quick. I believe that was one of the only gripes about these goggles, that they tend to scratch easily.