We remade the Diego as you may have come to know it. Same shape only stronger and made from better raw materials. You'll see mitred joints where temples meet the frame fronts, two thru-rivets per attachment point, and a robust hinge made from an alloy with increased nickel content for major strength. Each pair of Costalots comes standard with a set of Carl Zeiss logo-engraved lenses. Sharp + crisp vision. Frame: China. Lens: Japan. Coloring, case, lens cutting/fitting: USA.