Rapid is an easy to wear sunglass that is lightweight with both Polycarbonate frame and lenses. We've included a High Definition lens that offers sharper and better peripheral vision than the standard lens. This helps the wearer to better see objects or irregualrities in the road, trail, or path. To top it off we added a REVO mirror coating to the outside to reduce glare & increase visual comfort. AND anti-fog coating to keep your lenses clear when your body temperature rises. These are great for any kind of outdoor activities.