The Giva sunglasses have an exaggerated oval shape and logo-bearing arms. Innovative craft continues to be key to our vision of responsible luxury - both the frames and lenses are made from bio-based materials. Materials and Care Frame: 100% Acetate ; Lenses 61% Fossil Fuel; Lenses 39% Plant Based Resin Use a damp cloth and a mild soap to clean the lenses then dry them with the soft cleaning cloth sold with the product. do not use solvents (e.g alcohol acetone) or aggressive detergents which may alter the features of the glasses.