Mavic's Cosmic Ultimate Helmet is the lightest road helmet they make. It's both CE and CPSC-certified, yet weighs only 210 grams (size: medium). One of their most technical helmets, the Cosmic Ultimate is packed with features to help you ride fast and stay comfortable. Its Cosmic Ultimate Fit Pad provides progressive padding with an anti-bacterial and anti-odor lining featuring X-static to keep the helmet comfortable and fresh, mile after mile. The helmet has a vertical adjustment system to adjust specifically to your head shape, while an Ergo Hold SL retention system keeps the helmet securely on your head, allowing you to quickly and easily make small adjustments with one hand. And, cooling duties are easily handled by 26 generous vents, so your head stays plenty cool.