Ray Ban RB4264 Chromance Sunglasses Silver Mirror Chromance BlackWhen extraordinary vision relies on pioneering design and high performance features, Ray-Ban always steps up to the challenge: live the revolutionary experience of Chromance lens technology in total style. The bold profile of this powerful new squared shape with exclusive new lenses takes game changing, high performance vision to a whole new level. Available in tones of matt black or tortoise and shiny gray, this lightweight, flexible nylon fiber frame flaunts revolutionary Chromance lenses in bright blue flash or on-trend mirror shades, which maximize contrast and enhance color perception for a brighter, perfectly clear vision of life that moves as fast as the most active urban players.