CREATED SPECIFICALLY FOR CHARGING YOUNG GROMS ON THE MOUNTAIN - The Spur uses the same technologies as Giro's adult helmets in youth small and extra-small sizes. I.M. CONSTRUCTION - I.M. Construction fuses a tough polycarbonate outer shell with the helmet's impact-absorbing foam liner. The fusion process allows for better ventilation systems, making I.M. helmets lighter and cooler than traditional helmets. IN FORM FIT SYSTEM - In Form fit system with ergonomic adjustment dial and vertical tuning feature VERTICAL TUNING - Accommodates different goggles and head shapes for a custom fit free of gaper gap FEATURES - Lightweight construction. In Form Dial Fit System. Super cool Vents. Removable goggle retainer. Removable ear pads.