Iconic Sidney XTAL white sunglasses 🕶️ with square Bio-acetate frames in transparent color and Kimoa logo in slight relief on the Kimoa blue temples. Polarized blue mirror lenses in shades ranging from orange to yellow. Bio Acetate is a biodegradable material. Cellulose is a natural polymer that forms the backbone of the entire plant kingdom. The traditional plasticizer has been replaced by a plant-based plasticizer, which makes a bioplastic with considerable bio-based content.