Oakley Flak Jacket Sunglasses Silver / Fire Iridium 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 wont 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 Oakleys HIGH DEFINITION OPTICS (HDO). Choose the nose pads that give you the best fit  two sizes are included with every frame. Like the stem sleeves, theyre made of UNOBTAINIUM to increase grip with perspiration. Oakleys 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. Pure PLUTONITE lens material filters out 100% of all UV, and FLAK JACKET meets ANSI Z87.1 standards for impact protection. The semi-rimless design means theres 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. FLAK JACKET is available in two lens shapes: standard size and the larger XLJ. Optional lenses with Oakley polarization block glare while maintaining the best optical clarity on the planet. For lenses that lighten and darken automatically, choose OAKLEY ACTIVATED BY TRANSITIONS. The frame is also available in sport-specific arrays that include three lens colors and a case to transport the full set.