For hours of trail running, endless laps on a mountain bike circuit, or miles on the road bike, it pays to keep a close eye on rocks, roots, and potholes. Smith Vert PivLock™ sunglasses offer panoramic vision to keep you focused, whether you're tackling a climb or racing downhill at full speed. With their cylindrical lens and rimless design, they're ultralight and unobtrusive, while providing a wide field of vision. The PivLock™ system lets you switch in a flash from the mounted ChromaPop™ lens to the additional clear lens included, depending on the light conditions. With nonslip nose pads and temples, these sunglasses stay firmly in place, even on fast descents and rough terrain.