The Oakley Flak 2.0 XL has been an Oakley staple for years now. It's predecessor, the Flak Jacket XLJ, was already a great frame and Oakley fine-tuned it to make it even better! The main difference between the new Oakley Flak 2.0 XL and Flak Jacket XLJ is this model has updated styling, is even more comfortable, and provides an improved field of vision with better upper peripheral view and even more wrap around coverage. Oakley Flak 2.0 XL sunglasses are constructed with Oakley’s proprietary O-Matter for amazing durability and ultra-lightweight comfort. Unobtainium earsocks and nosepads and Oakley’s Three-Point-Fit system help keep your glasses securely in place even if you break a sweat. If you are interested in using these for a particular sport, you should really check out the PRIZM lenses. These are sport-specific lenses that will boost contrast and allow you to perform at your best! Need prescription Oakley Flak 2.0 XL sunglasses? Done. Call or chat with our friendly Sports Opticians if you have any questions about ordering Oakley Flak 2.0 XL prescription sunglasses. And as always, we offer free shipping & returns!