The Oakley Half Jacket Sunglasses have an open-edge design to expand your field of vision. Designed for high-speed sports, these shades let you move as fast as you can. When the sun fades or flares, switch to a new set of optional lenses must be purchased separately and change your entire outlook on life. Accented with true metal icons, the lightweight O Matter frame includes Unobtainium earsocks and grip anchors. The lenses retain the peripheral clarity of XYZ Optics. Replacement lenses sold separately.