There is a range of sleeping bags styles the best sleeping bags come in all styles and shapes. We’ve grouped them into three categories: rectangular, semi-rectangular, and mummy-style. Deciding which one is best for your chosen adventures will depend on a myriad of factors, such as your activity, sleeping style, body shape, and the conditions wherever it is that you decide to camp. Once you know the shape you desire you’ll be ready to make your choice on the ultimate sleeping bag for you.