Special grip coating and silicone inserts used to construct the frame to help eliminate slippage when sweating; Snug, lightweight frame with a comfortable fit that prevents bouncing whether you're flexing pecs or flying jets; Glare-reducing, polarized lenses with UV400 protection blocks 100% of those harmful UVA and UVB rays; Shape built to give you the ultimate speed advantage whether you're crushing beers or crushing your competition; Made for bigger noggins