Flak Jacket XLJ lets you change lenses in seconds to optimize vision in any sport environment. Multiple lens colours are available, and all lenses feature the unbeatable clarity of Oakley High Definition Optics. Choose the nose pads that give you the best fit; there are two sizes included with every frame. Like the stem sleeves, these made of Unobtainium to increase grip with perspiration. Oakley Three-Point Fit optimizes comfort and holds the lenses in precise optical alignment for superior clarity. Flak Jacket XLJ 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 no frame rim to block downward view. Optical clarity exceeds ANSI Z87.1 standards, and XYZ Optics extends razor-sharp vision all the way to the lens periphery. Features in brief:*Interchangeable lenses to optimize performance in any environment*Durability and all-day comfort of lightweight, stress-resistant O Matter frame material*Optimized peripheral vision and side protection of 8.75 base lens curvature*Comfort and performance of Three-Point Fit that holds lenses in precise optical alignment*Metal icon accents*Optical precision and performance that meets ANSI Z87.1 standards*Impact resistance that meets ANSI Z87.1 standards for high-mass and high-velocity impact*UV protection of Plutonite lens that filters out 100% of UVA / UVB / UVC & harmful blue light up to 400nm*Glare reduction and tuned light transmission of Iridium lens coating*Multiple interchangeable Unobtainium nose pad options for customizable and comfortable secure fit*Protective sports-specific Oakley Soft Vault included with capacity for extra lenses*Available with Oakley Prescription Lenses (+2.00 through -3.00 combined power)Lenses with this frame: Prizm Golf: Prizm lenses fine-tune vision for specific sports and environments by emphasizing colours where the eye is most sensitive to detail, and improves performance and safety by enhancing vision.