SMITH CARBONIC lenses are optically tuned to give you visual comfort while including ANSI Z80.3 standard for impact resistance, water and oil resistant coating and 100% UV protection. EVOLVE Eco-Material Construction. Our proprietary Evolve material incorporates 53% bio-based material into our injected-polymer sunglasses. Smith sunglasses are the largest eco-friendly sunglass collection in the world. Medium fit / Medium coverage; 6 base lens curvature; Auto-lock hinges; RX compatible; Includes Archive collection fleece storage / cleaning bag Lens Width 54mm / Lens Height 44mm / Bridge Width 19mm / Temple Length 140mm Sport type: Yoga