PRODUCT OVERVIEW: If you own the most technologically advanced piece of sports equipment on earth, be sure you get the most out of it. Oakley Flak Jacket™ XLJ is engineered with an interchangeable lens design to let you adapt to any sport environment. Three unique lens shapes are available, so you can choose the amount of coverage that works best for your outdoor activity, and for the way Mother Nature sculptured your facial physique. We offer a wide range of accessory lens sets including vented designs that offer cooling airflow, as well as the best polarized lenses under the sun. Oakley polarization technology uses a liquid infusion process to bond the polarizing filter at the molecular level. That’s how we eliminate the haze and distortion found with conventional technologies and achieve unbeatable glare-cutting performance. Our durable Plutonite® lens material offers superior impact protection and filters out 100% of all UV rays. High Definition Optics® (HDO®) maximizes clarity with patented innovations like Polaric Ellipsoid™ geometry for precise, crystal clear vision at every angle of view. Important Note: Use care when installing/removing accessory lenses. Scratched lenses can not be returned and are not covered under Oakley’s warranty policy.