1. The beanie itself is thin. Yep, thinner than most of my winter beanie from other makers.2. It's Big for sure, but I have a ginormous head, so it fits me well. I can pull it all the way down to cover my ear with no problem at all. 3. Warm? I would say this is not one of the beanie that you will wear just by itself in any freezing temperature and expect to be warm without doing much of anything. If you are doing outdoor stuff, it will keep you warm for sure, but just running errands, probably not that warm in freezing temp. Overall I'm Happy with the purchase, since it's awesome looking, and relatively warm for how thin it is. Arcteryx really doesn't disappoint.
"I like to stay warm & you should join me..."
Very comfortable and warm which is the reason for getting it. The great thing is it works from freezing temps to just a little cloudy day out in the city. Has plenty of head room allowing one to pull it way down if the temps call for it. Arcteryx has let to let me down & this product delivers just like their jackets! Get at least one!