Even if you haven"t witnessed a disaster firsthand, you"ve seen the devastation they cause and you know that you can never be too prepared. If you are out on the water; preparation is even more important. Food rations from Datrex are made from all natural ingredients, have high energy value and are tabletized and sub packaged for easy rationing. They have a five year shelf life and are USCG approved so you know you can count on them when you need them.200 Calories per bar/4 packs of 12 bars.