I know for panther and such you MUST have ASTM approved lenses, it's an insurance thing.
Bigfoot since it's an airsoft field I was told sealed ballistics are allowed.
As for the mesh goggles, apparently that's a "myth" according to someone at Arnies, but I haven't looked into the science. I know for a fact though I wouldn't want to have hundreds of pieces of plastic headed for my eye, even if it's at a relatively low velocity so just to be on the safe side I'll use ballistics.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE