Geared for speed. The Shift MAG™ gives cyclists and runners every performance advantage possible, from the superlight frame down to the nose piece. The coolest feature is no doubt the interchangeable lens technology. Snap the magnet on the side for quick, fingerprint-free lens changes. These Smith sunglasses come with one clear lens as well a color-enhancing ChromaPop™ lens. Flatter than most performance eyewear, the 5-base frames stay put with a two-position nose piece and no-slip temples. They give you a secure feel when you're going your fastest. ChromaPop™ lenses enhance contrast and natural color to make the details pop. Smith MAG™ lets you change lenses quickly. Medium fit, large coverage. 5-base lens curvature for slight wrap fit. Megol temples provide non-slip grip so glasses stay put. Two-click position adjustable fit Megol nose pads. Includes: Clear lens, Performance hard case and Microfiber bag. .