I would recommend going against mesh googles. There's too many factors involved with whether the BB will shatter or not on the googles. The bb brand, how old the bb's are, have they been exposed to a lot of UV (will weaken the plastic), the fps of the gun etc etc.
If you do a search on here for mesh goggles or wire goggles you'll find some reviews past users have done. I once even found a thread...possibly on another forum where the reviewer used a bolt action lvl2 or lvl3 sniper rifle at 20 feet against his mesh goggles and it tore clean through, he wasn't wearing them at the time of course.
One of many links you can find on google when you search for paintball/airsoft goggle mesh/ansi rating.
http://www.airsoftforum.com/board/in...howtopic=69231
And why mesh masks are bad:
http://www.airsoftforum.com/board/in...howtopic=59480