The ration packs contain enough calories for a day in the hills. This is enough for 12 in normal activity according to statistics .These All day rations packs have 2 ready to eat meals. The us army ration packs have only 1 main meal .The ration packs are fully cooked and can be eaten cold or hot. The meals come in special pouches that can be heated by placing them in hot water. Or is know as boil in the bag. You can also heat them in a pot or by flame less heater.These ration packs are the type use by the Military, however, lots of people who go hiking and camping are now beginning to use them, these are available to collect in person from our Glasgow shop, or can be ordered on-line.