Giro asked professional riders for feedback in desinging the Ionos - they always ask for two things: make it cool, make it comfortable. Naturally, these requests became primary development goals for Ionos. And now that pro riders always wear helmets in competition it's more important than ever for Giro to deliver a helmet that meets the riders exacting needs. The Ionos™ takes light weight, comfort, and cooling to a new level. It is a "must have" product for the serious cyclist
Features
5 vents and internal air channelsFully optimized shape and placement of ventsAirflow has been increased fifteen percent21 active vents with internal exhaust channelsGiro's Roc Loc 4 is the industry benchmark for adjustability, durability and comfortSo comfortable that it virtually disappears when you put it on| Giro Helmet Sizing |
| S | M | L |
| 51-55 cm / 20"-21.75" | 55-59 cm / 21.75"-23.25" | 59-63 cm / 23.25"-24.75" |
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