Beautiful Fletcher sunglasses - Warby Parker - great condition. Some subtle surface scratches on 2 spots on the left side. See last picture Materials Made from hand-polished cellulose acetate Prescription lenses are made from polycarbonate, the most impact-resistant material for sunglasses; non-prescription lenses are made from CR-39 for maximum clarity and color Medium 137 mm Polycarbonate lenses Impact-resistant lens material for glasses Scratch-resistant lens coating Lenses block 100% of UV rays :-)