Oakley Flak Jacket XLJ Polarized, High Definition Gray Lens with Matte Black Frame & Unobtainium Temple Sleeves & Nose Piece for Adults World-class athletes have driven us to create innovation after innovation, and Flak Jacket takes that to the next level with the latest in performance technology. It features a lightweight O Matter frame material with ellipse metal icon accents, unobtainium earsocks and nosepads, and interchangeable lens system. (Additional lenses not included)