Works beautifully and fits my medium size head!
Nice fuzzy feel to it too.
Heed this warning however: If you have a large head it will not cover all of your ear.
On a trip to the Adirondacks, I found myself in more snow than my party was accustomed to on a certain side of one of the mountains. We were post holing all over the place. I say all this to vouch it truly IS waterproof. I have worn these on approximately 10 trips, and wear them any time I'm on my feet for long durations of time. I'm amazed at the support that they offer, and the back issues that I don't have when wearing these shoes. Only issue I have found is sometimes if I don't get the tongues positioned just right they put pressure on the front part of my foot and my foot aches against the pressure. This issue was resolved after working them in completely.
First of all, we all know mountain hardware to be very good at what they do, and generally I found this bag to be at these standards. I've tested it in the lower 30's nights and never found myself getting cold. Anything colder than that, get another bag. If you are 6 foot, I would suggest to upgrade to the long version. I went with the smaller version and find myself wanting to stretch out fully, but just barely able to. Not as sturdy as I would of hoped from Mountain Hardware, I had a few threads go out by the zipper, but was fixed pretty easily. I've been on 10-15 trips so far with this bag and have found it to meet my fall and spring outings beautifully. In summer I don't use it, I just cover up with a blanket because I would get too hot. Lightweight, and 90% comfortable makes it a 4/5 in my book.