Oakley designed the Flak range to look stylish but remain functional for the majority of sports as well as casual wear. Built with Unobtainium® ear socks and nose pad, the glasses keep their same great fit even when you begin to perspire in hot conditions. Prizm™ lens technology controls differing light transmissions to ensure the same great view despite the environment. XL lens size increases your field of vision, allowing you greater visibility in potentially difficult situations. Finally, the glasses are provided with the Oakley shell hard case that means your glasses remain protected even when they're resting and a micro-fibre carry bag to help keep them clean.