Whether we're blasting across lonely country highways or picking out our line on steep, rocky downhill trails, the Smith Shift Split MAG Photochromic Sunglasses ensure optimal optics for day-long rides. Smith's ChromaPop lens technology gives us clear, crisp vision so we can fly along technical trails and pick our way down smooth sandstone faces. The photochromic lenses adapt to changes in light, ensuring we are never riding blind as we transition from shaded forests to wide-open meadows and the MAG system allows us to easily change our lenses so we can be prepared for any conditions.