The Oakley Flak Jacket XLJ sunglasses feature a wide lens that flares out to the side of the eye for increased field of vision. The lightweight black O-Matter frame has Unobtainium nosepads and frame socks to make long-term wearing comfortable, while its impact-resistant lenses can survive the falls and impacts that come from an active lifestyle. High Definition Optic Lenses provide high optical clarity and visual fidelity.