Oakley’s Flak 2.0 XL deliver fierce performance with matching style for your active life. The frames are crafted from Oakley’s incredibly lightweight and strong O-Matter material to stand up to all your adventures. Their Plutonite lenses feature High Definition Optics for the highest level of optical clarity and they filter 100% of all UV rays while meeting the highest impact protection standards. The XL designation means they extend peripheral protection against sun, wind, and debris to keep you going at your best. Plus, the ear and nose pieces are made of Oakley's hydrophilic Unobtainium, which improves its grip when wet, so your glasses stay exactly where you want them, even during the most rigorous activities.