Oakley Sunglasses - Sutro Photochromic (Transition Lens)Oakley transition glasses designed with performance in mind. Sutro are the ultimate glasses that give riders a bold and versatile look they can confidently wear anywhere. Photochromic Sutro glasses feature a clear base lens for darker light conditions, transitioning to a black lens in bright light conditions. Durability and all day comfort with lightweight O Matter frame material Ridged and textured Unobtainium added to the inside of the temple for