Inspired by the lightweight and low profile design of the original Dashm, the reinvented Dash AF features improved style and fit. The new adjustable nose pads and the lightweight rimless frame makes the Dash Advanced Fit (AF) float on the face and stay in place at high rates of travel. Native Eyewear's Bio-based plant resin is a high-performance material which is both extremely lightweight, yet durable enough to resist temperature extremes. Native lenses protects against UV rays, defending your vision against long-term sun exposure. The hypoallergenic cushinol has a nonslip grip to keep your sunglasses in place while you are getting after it.