I keep waking up at 3 or 4 in the morning trying to get warmth on my head, but it simply isn't enough and I end up staying up making me even more tired. I have a beanie for my head, sleep mask for my eyes, but need something for my nose and mouth because I breathe in cold air. It can get around 40 degrees around here and it's the first time I'm living in such a cold environment. There's no heater either. Any suggestions?