Built for the athlete who wants it all, the Under Armour Core S powered by SWITCH patented magnetic interchange lens system® uses high-energy magnets embedded in the lens and frame to allow you to swap lenses quickly and easily as light conditions and activities change. The unique air flow technology directs air flow through the lens to keep you cool. The Core S offers a premium secure fit through adjustable temples, the adjustable nosepad, three-point grip and cushioned hinge. The Under Armour Core S is the ultimate sport sunglass no matter what the conditions. Includes an additional set of magnetic interchange lenses.