Rating: 5 / 5
I was using a Montane Aero for a while but picked up the OR Ion when I realized how much warmth a windproof hood can add to a layering system. The fit and function is comparable to the Aero, but the material OR uses is perhaps a bit thicker and slightly less breathable, although that means that it's also a tad more windproof. The hood has good adjustments and even has a stiffened, crushable bill. These combination of features lead to my one complaint that, when the hood is cinched tight, the bill of the hood gets in the way of my vision. Otherwise, highly recommended.