Sleeping bags also come in a range of materials depending on their use. A flannel-lined sleeping bag provides warmth but also provides softness next to the skin. Nylon sleeping bags "breathe" better and do not retain moisture, so they will dry more quickly than other styles. Poly-cotton blends are probably the most durable option and work best in extreme terrain.

There are also differences in the way sleeping bags are sewn and filled. Down fill provides great natural warmth, but cotton, polyester, and new types of synthetic fills are also available. Many new synthetics use a "hollow fiber" method that keeps sleeping bags light and allows for good compression when packing, while still offering excellent warmth. Synthetics are affordable and easier to care for than down.

The way sleeping bags are sewn is also important to consider. Some are made like quilts and the entire bag is stitched into small pockets of fill. This keeps the fill in place, instead of letting it all fall into one section of the bag. Other styles sew "tubes" into the design, using long narrow pockets instead of small squares. Tubular designs are also intended to keep fill in place.

You can also find great sleeping bags for children. These designs are smaller, child sized versions of regular sleeping bags. Most are made in the rectangular style, and you can find a wide variety of designs and trademark characters. Some are made to coordinate with bedroom accessories and are perfect for use as extra sleep space when your child has a sleepover.

Sleeping bags are not just for camping any more. They are used for all kinds of adventures, as well as sleepovers and slumber parties, or when beds are limited on vacation. If you need a sleeping bag, don't just pick the first one you see. They are available in many different designs and constructions to suit nearly any use you can imagine.