Mavic cosmic ultimate ii helmetmavics cosmic ultimate ii helmet is as fast and light as you get its a serious helmet for cyclists conscious about speed for starters its the lightest road helmet in mavics collection whereby the medium size weighs just 210g its also one of mavics most technical helmets packed with features to help you ride faster and stay snug in the heat mavics 37 5 fabric is used on the padding to attract humidity vapour and absorb heat from your head cosmic ultima