Ionos is the most ventilated and technologically advanced road cycling helmet Giro has ever created. Our proprietary in-mold composite sub-frame (I.C.S.™) provides the strength to support 21 of the largest vents ever carved into a helmet. These massive vents—coupled with an intricate network of internal channels—create a cooling system we call Wind Tunnel™ ventilation. The difference is remarkable and after one ride you’ll agree: the Ionos is the coolest, best-ventilated helmet available. This is the reason that Grand Tour champions like Lance Armstrong and Alberto Contador choose Ionos to stay cool on the hottest days.


Road Race, Triathlon, MTB XC Race, Cyclocross, Track Race, Enthusiast Road
In-mold composite sub frame (I.C.S.), X-static padding, award winning design, multiple Grand Tour championships, X-static padding
In-mold Composite Sub-Frame EPS liner, polycarbonate shell
Roc Loc® 5
21 Wind Tunnel™ vents, internal channeling