An increase in performance shouldn't mean a sacrifice in style, and with Oakley's Flak 2.0 sunglasses, they kept style in tow. With large, High Definition Optics® lenses, these frames make sure that every millimeter is optimized. The lightweight O Matter™ material ensure a comfortable, durable pair of sunglasses and the security of Unobtainium™ earsocks and nosepads means you never have to worry about slippage.