Be prepared for a disaster. Survivor Industries ' emergency preparedness products include this case of 10 packages of Mainstay 3600 Emergency Food Ration kits, each with 9 foodbars. Each bar has 400 calories. Each food ration bar weighs 2.67 ounces and is Kosher and meets the dictates for Halal . Keep this emergency food kit in your car or home. This is the only emergency food developed especially for land and marine based environments. Each pre-packaged meal provides a nutritional balance of essential vitamins and minerals in 400 calories.