Bike helmet HJC Furion 2.0 helmet - gray, size M-(55-59 cm)/ new in original packaging SELFIT: automatic, self-adjusting adjustment system with 5 different adjustment options: COOLPATH™: technology patented by HJC that replaces the inner padding Skeleton frame integrated into the EPS reinforces the helmet In-mold construction Venturi Dynamics: designed according to Bernulli's law for maximum ventilation of the helmet Wind tunnel tested Advanced air tunnel system Aerodynamic design Light as a feather (see photos)