Trivex photochromic lens will darken in the sun and lighten in the shade is the only one of our new trivex lenses with this feature. For bikers, hikers or anyone out for a long day during mixed light conditions, this lens will adapt to provide a consistent high-quality visual experience. This lens features the latest in photochromic technology that will adapt to changing light conditions even while driving your car. This lens will darken to a full sunglass in bright sun but turn to a light tint in the shade. Under any light conditions, this photochromic lens will increase the contrast between colors making them seem brighter. This Trivex lens has anti-reflective and oleophobic coatings to improve performance.