These sleeping bags protect an individual much more than the basic outdated space blankets.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. Dimension : Package: 3" x 6.5" x 1" Actual: 84" x 36" x 36"