The ‘Ultimate Driving’ Sunglasses unite the racing heritage of Team Ikuzawa with the exceptional craftsmanship of Japanese eyewear atelier Native Sons. Native Sons, founded by eyewear industry veteran, Tommy O’Gara, the frames are designed and manufactured by hand by a small team of expert craftsmen in Sabae and Fukui City Japan. Frames are constructed using custom Takiron cotton based acetates, high grade titanium plated with custom gold and silver formulas, and Shima Optics lenses are used exclusively. From the frame geometry to the lens performance, the design features straight temples for ease of wear with a helmet. The frames are named ‘ Tetsu’ in tribute to Tetsu Ikuzawa. Material - Takiron Cellulose Base Acetate - CR-39 Custom tinted Lens with Hard Coat Size - Lens: 50.6mm - Nose Bridge: 19.3mm - Temple: 144mm All original hardware - Diamond Tooled Core Wire - Scoop Arrow Hinge with Star Nut - Hex Rivet Pins Additional info - Collectors-Edition Leather Case and Box - Collectors-Edition Large Cleaning Cloth Note: To minimize customs duties and shipping delays, products are dispatched from local hubs in Japan, the UK, or the EU whenever possible.