Lens techonology: The Lenses are designed to block 100% of harmful ultraviolet (UV) rays from the sun. Product details: Frame Size-Medium; Lens Width-57mm; Bridge Width-16mm; Temple Length-140mm The Sunglasses are made up of Metal frame with Polycarbonate Lens in the shape of Aviator Care Instructions: With the Titan lens Solution, keeping your shades clean becomes very easy. Just spray some on your lenses and wipe them with a microfibre cloth to keep your lenses smudge-free.