Specially engineered for youth faces, Quarter Jacke#8482 blends the convenience of an interchangeable lens design with the clarity and protection of High Definition Optics & reg so the new generation of athletes can take advantage of Oakley innovation. Accessory lens tints adapt vision for the chosen sport and environment, and with the sure grip of Unobtainium & reg components, the durable yet lightweight frame stays comfortably in place. Its styling flows with fluid contours while its technology takes an aggressive approach to performance. O Matter & reg frame material is one of the secrets behind the durability and comfort of this frame. It's a stress-resistant, lightweight synthetic that maintains a critical degree of flexibility to offer a feel-good fit with impact resistance.1 optical standards. The 8.75 base lens curvature extends your peripheral view while improving side protection against sun, wind and impact. Head-on protection meets ANSI Z87.