I bought these in the hopes of having them for a long time and to wear hiking. I've heard nothing but great things about Native and the venting system ... so they don't fog up.
First these are really SQUARE, like the kind of glasses you see people in that just had eye surgery, not flattering. Secondly, they fogged up on the first hiking trip I took them on.... and they killed behind the ear where the end tip lays. Lastly, they don't cover the eye completely although they are large ...all of the lens sits from the bottom of your eye and down. Light shone in from above causing me to squint while being fogged up and in pain..not cool! They are made out of chintzy plastic too! I was surprised at the lack of quality on these. Needless to say, they went back!