These sleeping bags protect an individual much more than the basic outdated space blankets. The bags are waterproof and windproof and retain 90% of your body heat. It doesn’t have the openings on the bottom which is where most of the heat is lost in the emergency blankets. Don’t settle for anything less.
Posted by James on 12th Feb 2010
If your camping and you have one of them with you put your sleeping bag inside of it. It will help keep your body heat in a lot better then just the sleeping bag by it's self. Other then that there nice to have in any survival kit.