Oakley designed the Flak range to look stylish but remain functional for the majority of sports as well as casual wear. Black Iridium™ lenses are designed for the brightest of conditions where, without specialist lens design, your eyes become tired as a consequence of having to work overtime in order to process the light. However, black iridium lenses transmit the light helping to build an image in which your brain can process accurately. Built with Unobtainium® ear socks and nose pad, the glasses keep their same great fit even when you begin to perspire in hot conditions. 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.