The Half Jacket 2.0 XL gives you the competitive edge, thanks to its swappable lenses. Built with the same impact protection and high-definition optics that are the standard for Oakley, the Half Jacket also makes it easy to swap lenses for different tasks. From the Black Iridium lenses which block 91 percent of light, to Oakley?s high definition lenses that lend clarity in low light situations, these sunglasses are a veritable tool chest for your eyes. And with Oakley's exclusive Unobtainium earsocks and nose pads, the Half Jacket offers comfort that lasts all day.