The Giro Ionos Road Cycling Helmet is the most ventilated and technologically advanced road cycling helmet Giro has ever created. Their 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, making Ionos the coolest, best-ventilated helmet available. Perfect for keeping Grand Tour champions like Lance Armstrong and Alberto Contador cool on the hottest days and over the most tortuous Alpine climbs.

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Features:

In-mold technology

Roc Loc 4

Super fit engineering

Composite subframe

Cool vents

Ionos volume comparison

X-static helmet padding

Wind Tunnel Ventilation

Sizing: S (20"-21.75"/51-55cm) M (21.75"-23.25"/55-59cm) L (23.25"-24.75"/59-63cm)