Ideal for places where there is strong glare - e.g. by the sea or when skiing, where there is no shadow and high glare levels when sunlight hits the water or the snow. The glasses have a great sun screen, in leather, that sits comfortably tight against the face, providing the optimum screen against the sun's rays. The glasses are treated so that they do not fog up when you are physically active. The lenses are made from polycarbonate, and provide scratch-free UV-400 protection - protection against the sun's harmful rays and have a comfortable and practical elastic strap.