Bringing you the highest quality materials, Nia is designed to elevate your everyday look with elegance and class. UV 100 Protection Highest Quality Scratch-Resistant Aspheric Lenses: thinner and light weight Premium Polycarbonate: technology that provides a sturdier frame Spring Hinges: for maximum comfort and flexibility  Sizing:  Lens width: 44mm Bridge: 28mm Temple: 145mm Lens is an all around strength  Nia | R-3023-C4-SR Green Black Tortoise