Authentic Warby Parker Aurelia 200 Dark Tortoise Black Sunglasses 50-21-140 Materials Made from hand-polished cellulose acetate and stainless steel 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 Width guide for: Aurelia in Jet Black with Polished Gold Preowned excellent condition!!! Comes with box, case and original cloth. Elevate your style with these chic black sunglasses. Perfect for any occasion, they offer a sleek and modern look.