Oakley Flak Jacket XLJ Jet Black Frame with Black Iridium Lens. These babies are a stylish & innovative sports performance frame, featuring quick & easy lens changing capabilities. This means that you can stay ahead of the sun & change your lenses to match the different light conditions. They look great & can be worn everyday without looking like you should be wearing lycra. The XLJ lenses are larger than the standard design providing additional coverage & protection. Flak jackets are supplied with an Oakley sports case which incorporates slots for additional lenses Lens Neutral contrast 10% light transmission Category 3 Interchangeable lenses to optimize performance in any environment Optimized peripheral vision & side protection of 8.75 base lens curvature UV protection of Plutonite® lens that filters out 100% of UVA / UVB / UVC & harmful blue light up to 400 nm Glare reduction & tuned light transmission of Iridium® lens coating Frame Durability & all-day comfort of lightweight, stress-resistant O Matter® frame material Comfort & performance of Three-Point Fit that holds lenses in precise optical alignment Metal icon accents Optical precision & performance that meets ANSI Z87.1 standards Impact resistance that meets ANSI Z87.1 standards for high-mass & high-velocity impact Multiple interchangeable Unobtainium® nose pad options for customizable & comfortable secure fit Protective sports-specific Oakley Soft Vault included with capacity for extra lenses