Neckwear
A neck gaiter is one of those pieces of equipment you'd rather have and not need, than need and not have. They're lightweight, inexpensive, and are much better than tying a bandana around your face, which always inevitably freezes after five minutes on the mountain. And yes, before you ask, it's ba·luh·klaa·vuh, not baa·kluh·vaa. If you forget, just remember that baklava is what you eat, a balaclava is what you wear on your face.