Shift XL Mag 142mm Shield Sunglasses

The best sunglasses are the ones you forget you’re even wearing—and these truly disappear once they’re on your face. They stay perfectly in place, even on long rides, with zero need for readjustment. Fogging has never been an issue, even in extreme humidity. The photochromic lenses are outstanding, smoothly adapting when moving in and out of dense tree cover. I’ve used both versions of the photochromic lenses, and I prefer the brown opal mirror for the superb contrast it gives on the trail. My only minor complaint is the shiny black finish, which looks a bit cheap on an otherwise great pair of shades.

The photochromic lenses don't darken very much at all, so they aren't really useful other than in very low light conditions. I wouldn't take these outside on even a partly cloudy day. I wore them outside in full sun conditions and I could barely tell that the lenses had darkened at all. I should have grabbed the black lenses instead. The lense-swap technology is great - fast, yet secure. The glasses themselves sit off the face more than others, so there is a bit of a large gap for debris to fly under.