Delivering style and performance, Optic Nerve One Sunglasses look great and are priced so you wont lose sleep if you forget them at the beach.. . . . . Polycarbonate lenses meet all ANSI Z80.3 standards for impact resistance. Provide 100% UV protection. Stylish square lenses, metal temples, and keyhole nose bridge. Optic Nerve One sunglasses are certified to meet the California Proposition 65 standards and Consumer Product Safety Improvement Act for zero lead content. Best fit for average sized faces .