SOS Food's 3600-calorie Emergency Food Bars have great taste, are easily digestible, and are compatible with drinking water restrictions. Its 5 year shelf life and compact size make it the ideal way to provide nutrition and calories during an emergency. The bars can withstand both extreme cold and hot temperatures ranging from -22°F to 149°F. Each 3600 calorie bar is vacuum-sealed and contains nine individually-wrapped bars that are 400 calories. This makes it easier to ration out to others or to keep the contents fresh over a period of time. This product is made in the U.S.A. and is U.S. Coast Guard and Canadian Transport approved.