Giro Ionos Road Helmet
Ionos is the most technologically advanced road cycling helmet Giro has ever created. Their revolutionary 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 exhaust ports, create a cooling system we call Wind Tunnel ventilation. Ionos keeps riders like, Grand Tour Triple Crown Champion, Alberto Contador cool and comfortable all season long.
You can spend more, but this helmet is a fantastic compromise between breaking the bank and getting great features. Nice and light with great cooling and easy adjustment (was a huge improvement over my previous helmet). One word of caution... the light weight makes it more prone to damage so if you're a clumsy ox and step on it like I did it may crack! I did; however, like it enough to replace it with another Giro helmet (this time an Atmos though... but only because i found it at a great bargain).
I use this helmet for both road and trail riding. Really keeps your noggin cool and fits oval shaped heads great! Worth the price tag for the comfort and cooling it provides!