The Mavic Cosmic Ultimate Helmet isn't a road bike helmet or a mountain bike helmet it's both. Mavic's designers took a completely new approach to helmet design to create a helmet that not only tackles both disciplines, but outperforms most sport specific helmets with light weight, superior protection, and a style all its own.More important than versatility however, is comfort. First, Mavic looked at optimizing the shape of the helmet. It conducted cranial mapping tests to make certain that the Cosmic Ultimate closely matches typical head shapes. Additionally, Mavic identified the not so obvious pressure points and contours, and made the interior shape of the helmet consequently flow along with the curves of the skull. But, even with a mound of data, there were still variances. This is where Mavic's Ergo Hold SL System comes into play. Like the previous model, it allows for as much as six centimeters of one handed, on the fly size adjustment. The SL Super Light model is smaller and lighter than its predecessor, however. For the final touches on fit perfection, as well as excellent moisture management, Mavic also included its Ergo Fit Pro Pad. At first glance, it might not seem like much, but the Ergo Fit Pro Pad is a low density, open cell foam that wicks water away from the skin and transports it to where it can quickly evaporate.After guaranteeing comfort, Mavic took a hard look at the aerodynamic and durability aspects of the exterior. First, Mavic fashioned a sleek, low volume profile. Then, looking towards ventilation, Mavic gave the Cosmic Ultimate 26 Clima Vents to keep your head cool. So, not only are you riding cool and protected, but the aggressive shape enhances your aerodynamic position.