Oakley Flak Jacket Jet Black with Black IridiumSport professionals demand nothing less than the best, and we've answered their challenge for decades. World-class athletes have driven us to create innovation after innovation, including interchangeable lens designs with unbeatable optical clarity. Flak Jacket takes that to the next level with the latest in performance technology.Plutonite lenses maximize clarity and impact resistance while filtering out 100% of all UVA, UVB, UVC and harmful blue light up to 400nm. Not a coating.High Definition Optics allow Oakley eyewear to meet or exceed the testing standards of the American National Standards Institute for optical clarity, visual fidelity, and impact resistance.Impact protection against high-velocity and high-mass impact.Patented Three-Point Fit that ensures the frame makes contact only at the bridge of teh nose and the sides of the head and eliminates the pressure points common with frames that hook the ears. O-Matter frame that withstands environmental extremes. Controlled flexibility enhances impact resistance while contributing to all-day comfort.Iridium lens coating balances light transmission and reduces glare.