Based on our top selling Sport & Street (BSSA001AC), we've updated this great frame with our 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 by offering high contrast.To top it off we added a silver mirror coating to the outside to reduce glare & increase visual comfort. Also comes with interchangeable clear lens. Fixed closed cell foam & a perforated frame provides regulated air entry to prevent fogging.