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 also USCG approved so you know you can count on them when you need them.200 calories per bar/2 packs of 18 bars.