Bolle Women's Grace Sunglasses, Polarized A14 AF, Shiny Tortoise Light yet offer good shock resistance With a visible light transmission of 16 percent , they are ideal for sunny environments 8 base. Offers better periphery vision Hydrophobic Coating: similar to a wax Coating on a ca Anti-fog Coating: eliminates condensation inside the lens Our polarized lenses align light rays from the sun, giving you a crystal clear view at all times The only prescription program which ensures optimum precision, comfort and frame balance for sports sunglasses Our polycarbonate lenses are 20 times more impact resistant than glass and three times lighter