Ray-Ban Xan Bio-Based, available in sleek black frames, is a new model that seamlessly blends fashion and innovation. The unique irregular shape, perfectly complements the dark grey mirror lenses to create an effortlessly stylish look. These sunglasses are an ideal choice for individuals who wish to be always stylish. PRODUCT INFORMATION STYLE RB4431 Xan Bio-Based MODEL CODE RB4431 66776V 0-134 FRAME DETAILS COLOR Black MATERIAL Injected SQUARE Irregular LENS DETAILS COLOR Dark Grey MATERIAL Polyamide Bio TECHNOLOGY Grey LENS PROTECTION INDEX 3N