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). Classic tortoiseshell sunglasses finished to the absolute highest standard. I have a great deal of love for my sunglasses over the years. They exemplify everything I strive for in a product. Difficult to make to this standard, uncompromising, high class. Cool.