There are few, if any, items more comfortable than flannel pajama bottoms. They are incredibly soft, very warm and quite stylish. Since they’re designed mainly to be worn while sleeping, you can’t really go wrong on color. But you don’t want to buy them too tight, as tight pajama bottoms can make it hard to sleep comfortably. If a whole set of pajamas—bottoms and a top—is what your flannel-loving girl prefers, there are plenty of them on the market in all the same colors, styles, and patterns. And yes, they’re just as comfortable as the bottoms alone are.