They almost flow too much air. When it gets a little cool out they're useless for keeping warm, but in the hot weather they're awesome.
If you end up getting a set keep in mind that they run a little small, so if your measurements are between sizes definitely go with the next size up. (...FWIW I find all Alpinestars stuff to run small)
So far I really like them, they fit awesome, and are very comfortable. They are not super breathable, but I don't have any issues with my hands overheating, or getting too sweaty. Plus the carbon fiber just looks cool.