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ALIEN F: Sport sunglasses with a typically sports-fashion shape. Frame made of impact-resistant polycarbonate with antislip silicone inserts on the temples and on the nose pads. Photochromic lenses in shockproof polycarbonate protect the eyes every day, in the presence of sun, during the night or intermediate weather conditions. In addition, they are treated with a special resin which removes the condensation that forms on the lens surfaces in the transition from hot to cold. The reaction time of the photochromic lenses is very fast: only 8 seconds to go from light to dark, and 35 seconds from dark to light. In addition to the freetime, they are suitable for many sports such as motorcycling, skiing and golf.