We were suppose to go backpacking about a month ago with another family. The morning of I decided I was not going to carry heavy knit beanies for three people on my back. Sleeping in beanies is necessary, especially at our elevation. So I quickly sewed up some fleece hats. They are slightly hideous, but still great for sleeping. I made them super long, because the only thing I hate more than being cold in an old sleeping bag (my husband bought me a new one last year) is waking up cold because my beanie popped off my head. That way we can roll the brim lower and stay warmer!
this pattern for mine.