World-class athletes have driven Oakley 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. FLAK JACKET features Oakley Hydrophobic, a permanent lens coating that prevents rain and sweat from building up on the lens. It also repels skin oils and other contaminates, so the lens is smudge resistant and easy to keep clean. It even eliminates static electricity, so dirt and dust particles won t cling. FLAK JACKET lets you change lenses in seconds to optimize vision in any sport environment. Multiple lens colors are available, and all lenses feature the unbeatable clarity of Oakley s HIGH DEFINITION OPTICS HDO . Oakley s Three-Point Fit optimizes comfort and holds the lenses in precise optical alignment for superior clarity. FLAK JACKET is made of lightweight O MATTER for all-day comfort.