Designed for optimal clarity for mountain biking, the Smith Shift XL MAG ChromaPop Sunglasses are a popular choice amongst the Herd. Featuring a polycarbonate ChromaPop lens, we see every detail sharper and with more contrast. The frame is made of lightweight TR90 nylon for exceptional durability at a low weight. Megol rubber nose and temple pads provide a slip-free fit, and the 5-base curve cylindrical lens wraps around our face so we have excellent peripheral vision. The MAG technology allows for easy lens changes, thanks to the magnetic lock system so that we can change our lenses based on light conditions.