RB4255 Ray-Ban® Sunglass ChromanceThis rimless style is ensuring maximum lightweight and comfort combined with a sporty masculine design. The RB4255 also features the brand new Chromance lenses, the innovative and highly performing newest lenses in Ray Ban family. Chromance lenses fine tunes light, making everyday colors brighter, clearer, and more extraordinary. The special six layers antireflection treatment help maximizing contrast, granting more details in texture and contour.