Built to the exacting demands of ProTour riders, the Ionos offers premium cooling, chic style and maximum protection. 21 massive Wind Tunnel vents keep your head airy and dry, while the In-mold Composite Sub Frame provides massive amounts of protection when you need it most. Plus, the Ionos uses Giro's top-notch Roc Loc 4 system for a supremely comfortable and secure fit. And, this sweet lid is available in the colors of some of your favorite professional cycling teams.