FLAK JACKET features Oakley Hydrophobic lens coating that prevents rain and sweat from building up on the lens, repelling skin oils and other contaminates, so the lens is smudge resistant and easy to keep clean. It even eliminates static, so dirt and dust particles won’t cling. FLAK JACKET lets you change lenses in seconds to optimize vision in any environment. Lenses feature the unbeatable clarity of Oakley’s HIGH DEFINITION OPTICS (HDO). Stem sleeves and nose pads are made of UNOBTAINIUM to increase grip with perspiration. Three-Point Fit optimizes comfort and holds the lenses in precise alignment for superior clarity. Made from lightweight O MATTER for all-day comfort. Pure PLUTONITE lens filters out all UV, and meets ANSI Z87.1 impact protection standards. Semi-rimless design means there’s no frame rim to block downward view. Optical clarity exceeds all ANSI Z87.1 standards, and XYZ OPTICS extends razor-sharp vision all the way to the lens periphery. Includes case for transport.