The Oakley Flak Jacket XLJ sunglasses have a lot to offer. The first is they have a very comfortable fit and have great peripheral vision. The Flak Jackets are lightweight and can pass for a casual wear sunglass better than most sport specific sunglasses. The Flak Jacket XLJs have a more angular lens than the Flak Jacket.
Oakley lenses have exceptional clarity and contain features not found in other lenses. Hydrophobic HDO® lenses make lenses much easier to clean versus other lenses. Also, the anti-static coating won't attract dirt like regular lenses. High Definition Optics® (HDO) take advantage of patented innovations, like XYZ Optics® for unbeatable clarity at all angles of vision--even at the sides of lens contours that open peripheral view and optimize protection against sun, wind and side impact. The Black Iridium lens is an excellent all-purpose lens for sunny conditions. It offers truer color perception and features an Iridium® coating to reduce glare.