Whether you're into trail running, road riding, or fly fishing, there's an Oakley Flak 2. 0 XL Prizm Replacement Lens for you. Oakley's Prizm lens technology reduces glare and optimizes vision for distinct sports and environments, so you always have the perfect optics for all of your favorite activities. The Plutonite lens construction is designed to withstand scrapes and impact, and Oakley's High Definition Optics filter harmful UV light to keep your eyes safe through every pursuit. Swap lenses in seconds with interchangeable lens technology so you can get right to the action.