Native Eyewear’s DashXP offers a unique interchangeable lens system lets users switch lenses easily. Each pair includes two sets of interchangeable lenses. The Polarized Crystal Carbonate lens has the strongest hard coating available to protect against scratching, and self-adjusting cushioning nose pads create a non-slip grip that keeps sunglasses in place, ensuring a custom fit. P.C.C. lenses pass the rigorous ANSI Z80.3 tests for optical clarity and impact resistance while blocking 100 percent of harmful UVA and UVB light. Rhyno-Tuff AIR frames are engineered to endure temperatures, and a venting system is incorporated into the frame design to enhance airflow and virtually eliminate fog and condensation. The Dash XP weighs less than one ounce.