The lightweight Otto frame, named after Otto Toepher, is a round shape that combines a cotton-based Japanese zyl frame front with titanium. The ultra thin acetate is heat treated for durability and engineered to fit on a beta-titanium chassis that is both light, strong and durable. Made with the technologically advanced construction that combines the titanium chassis with a zyl front. The ultra thin beta-titanium temples add to the comfortability while being coated in 12k gold to maintain a jewelry-esque quality. Individually numbered and handmade in Japan from the world’s finest artisanal craftsmen.