A delightful combination of style and substance, the Era ChromaPop Polarized Sunglasses feature a chic yet subtle cat-eye design and Smith's ChromaPop technology for crystal clear optics. Carbonic lenses are impact-resistant and cut-glareBio-based Evolve frames are light yet durableChromoPop technology enhances color and contrastComfortable Megol nose pads prevent slippingPlease see size chart for lens tint informationLenspolycarbonatePolarizedyes (Carbonic or ChromaPop)FrameEvolve bio-based plasticNose/Temple PadsMegol nose padsCase Includedmicrofiber bagFace SizemediumBase Curve4Frame Dimensions[lens / bridge / temple] 55 x 48 / 16 / 145mmActivitycasualManufacturer Warranty[sunglasses, goggles] limited lifetime, [helmets] limited 3 years, [apparel, accessories] limited 1 year