The Oakley Half Jacket XLJ Sunglasses offer Oakley's new interchangeable lens system for larger faces and better eye protection. This chameleon lets you adapt instantly to any light condition. When the sun fades or flares, switch to a new set of optional lenses and change your entire outlook on life. Accented with true metal icons, the lightweight O Matter frame includes Unobtainium earsocks and grip anchors. The open-edge design extends your vertical field of vision and each set of optional lenses retains the peripheral clarity of XYZ Optics.