My sunglasses are completely hand made to create a perfect fit and luxury finish, crafted in rich heritage natural cellulose plastics for a superb quality hand feel. Lenses provide Maximum UVA and UVB protection and are Optical Class 1 for perfect visual clarity with Dark Tint Filter Category 3 (FC3). We tumble these frames in gigantic barrels full of wood chips, for days. Seriously. That's how you get the finish, the class.