From the top of the podium of the Tour de France, straight to your head comes Giro's Ionos. Built to the exacting demands of ProTour riders, the Ionos offers premium cooling, chic style and maximum protection. Giro's 21 massive Wind Tunnel vents keep you cool 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.
Small 20”-21.75” / 51-55 cm
Medium 21.75”-23.25” / 55-59 cm
Large 23.25”-24.75” / 59-63 cm
Thanks to 21 large vents and Giro's Wind Tunnel technology, channels inside the Ionos that force air in and out, this lid is 15% cooler than Giro's previous best-vented lid. In fact, tests prove this is the first helmet to keep riders cooler than riding bareheaded, even on the toughest climbs and hottest days!
Weight: 9.7 ounces
Learn about the Roc Loc 4 fit system.
Learn about Giro's In-Mold construction process.
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