The Oakley Sutro Clear To Black Iridium Photochromic adult sunglasses redefine the classic look of athletes. Inspired by the day-to-day life of urban cyclists, those sunglasses are highly enveloping and provide a bold, but versatile look. Built with High Definition Optics® (HDO®) technology, the photochromic lenses automatically adjust to changing UV light exposure while you are on the go so you can move confidently and seamlessly through their day.