Sleeping Bag Blog

Warmth
If you will be sleeping outdoors in sub-freezing temperatures, a mummy bag is often superior. When mummy sleeping bags are fully closed they typically leave only one’s nose and mouth exposed, thereby trapping air inside which acts as an effective insulator. Mummy bags also conform to the body’s contours which reduces the amount of heat the body must generate to maintain a constant temperature. (Mummy bags can also often be used in much warmer temperatures without being too hot.)

Most rectangular bags are best suited for temperatures above freezing, but some are capable of keeping you warm as much as ten degrees below freezing.Marmot sleeping bags make a lot of good mummy sleeping bags. So look for a sleeping bag that will keep you warm.