Oakley’s Prizm Road Flak 2.0 XL has game-changing technology to help you perform even better out on the road. When you’re carving through high-speed corners on your road bike, you need crystal clear vision to choose your entry and exit points. The Prizm lenses are optimized for color and light transmission experienced on the road, so you get unbeatable clarity to see subtle changes in the road surface. But that’s just the start; the frames are crafted from Oakley’s incredibly lightweight and strong O-Matter material, so they stand up to whatever adventures you have planned. The 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.