Oakley make eyewear good enough for people who commute at three times the speed of sound. So its only natural that they sculptured a frame with aviator styling. C-5 alloy keeps it lightweight and comfortable, and supple UNOBTAINIUM components increase grip with perspiration. It also offers 100% UV filtering and impact resistance that meets all ANSI Z80.3 standards. But the best thing about CROSSHAIR is something pilots insist on, along with everybody else who takes their vision seriously: the unbeatable clarity of Oakleys HIGH DEFINITION OPTICS (HDO).