We just got the helmets for a 5 week trip out West. This is by far the most comfortable helmet we have had so far. I don't know how they did it, but the vents move the air around---never felt it with the 2 previous helmets we had (one was an a modular and the other was a full). Both of us ended up going up one size larger than the we previously wore. Ended up buying the Bluetooth SRC system by Schuberth that is made for this helmet by Cardo. Read the other sites reviews on it, and decided to get it, as we both hated being "tethered" to the bike.