Featuring Native Eyewear's SportFlex lens, the sleek Nova is made to perform in a wide range of low-light conditions, giving you the power to see clearly, even when the sun is going down.Best fit for medium to large profiles. Nonpolarized SportFlex lenses suitable for wide range of low-light conditions with 60% VLT—ideal before sunrise, as the sun goes down, and on overcast days. Optical-quality, impact-resistant crystal carbonate lenses provide 100% UV protection. Venting incorporated into the frame design enhances airflow to eliminate fog and condensation. High-performance thermoplastic Rhyno-Tuff air frames for lightweight durability—withstand high-velocity collisions and temperature extremes. Anti-Ocular Intrusion System to prevent lenses from dangerously shooting toward your eyes in the event of impact. Cushinol nose pads ensure soft feel and custom fit; Cushinol temple boots create a nonslip grip to keep sunglasses in place. Cam-Action Hinges allow temples to quickly lock into position. Mastoid Temple Grip ensures temple ends hug the mastoid bone (behind your ears), allowing a secure and comfortable fit. Wire core temples. Includes zipper case and soft pouch.