Slumberjack Sleeping bags come in many designs. They come in a rectangular or mummy style and come in many temperature ranges for the season you are camping in. Sumberjack is one of the oldest manufacturers and have the highest quality in products in sleeping bags. Slumberjack sleeping bags makes a very comfortable sleeping bag. Mummy sleeping bags is made for the adventure seeker. Rectangular sleeping bags are made for a good night sleep for camper. You have a lot to choose from when buying a Slumberjack sleeping bag.