Bolle Women's Grace Sunglasses, TLB Dark, 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; Lens Color: TLB Dark Hydrophobic Coating: similar to a wax Coating on a car; Frame Material: Acetate; Lens Material: Polycarbonate Anti-fog Coating: eliminates condensation inside the lens; Frame Shape: Oversized; Frame Style: Full Rim Our polycarbonate lenses are 20 times more impact resistant than glass and three times lighter; Frame Colour: Shiny Tortoise; Lens Color: TLB Dark 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