There are few things that can top cuddling up in a warm, comfortable bed in the middle of a freezing winter. Many people change their entire bedroom decor in December to make it cozier and warmer by adding feather comforter sets, toss cushions, or chenille blankets However, if you own a waterbed or other unconventional bed, you may have trouble finding ways to keep you warm during the winter evenings. Make sure that you choose bedding that is compatible with your particular mattress size to ensure many nights of pleasant comfort.