Dark Tortoise; 100% Acetate; UV400 lenses offer maximum UV protection against harmful UVA and UVB rays; Imported. A modern take on a classic style, the Cassis Sunglasses are crafted from 100% acetate in a dark tortoise for a timelessly chic look. Each pair will be shipped with a complimentary microfiber cloth. If you choose to return this item, please note that it must be returned with the cloth in order to receive a refund.