React Optray SunglassesIn the world of sports sunglasses, youd think thered be nothing new under the sun. Shades are shades, right? We thought so until we tried Reacts solar powered, light adaptive shades. Battery free, hassle free and pleasingly light, React Optray sunglasses turn infrared light into electrical impulses to automatically toggle between medium, dark and very dark states as the conditions require. From riding into a tunnel, out into the sun, out from under