Native Eyewear Dash XP Polarized Sunglasses Interchangeable lens system, Sportflex lens included Rhyno-Tuff air frames are lightweight and comfortable enough to wear all day Anti-ocular intrusion system prevents your lenses from dangerously shooting toward your eyes in the event of an impact Optimal fit for medium profiles Cushinol nose pads ensure a soft feel and custom fit, regardless of nose shape or size