Switching lenses is all well and good, but even the fanciest magnetic system requires some level of fiddling with frozen fingers. The Julbo Razor Edge Goggles skip all that nonsense with Photochromic REACTIV lenses that adapt to changing light conditions. No stopping to retrieve your spare lens, no begging your crew to hold on while you figure out how everything goes back together. Toss in a huge field of vision and a clean, frameless design, and you have a winner.