MRE and military rations: what they are

The three letters on the tan bag are short for “Meal, Ready-to-Eat, Individual”, the ration that replaced the C-Ration in the US Armed Forces in the early 1980s. Below: what is in the bag, how the heater works and how long it keeps, Spain’s own rations, and what else is sold as military or emergency rations.

One MRE is a single meal in a bag

According to the US Army’s Natick pamphlet on operational rations (2012 edition), the MRE “is the primary individual ration of the US Armed Forces”, and each one is a single meal.

Inside the tan plastic bag, the same pamphlet says, “each MRE provides an entrée, an assortment of sides and bakery items, beverage base powder, and an accessory pack that includes gum, tissue, a moist towelette, and seasoning.” It gives about 1,300 kcal, made up of 169 grams of carbohydrate, 41 grams of protein and 50 grams of fat, and a weight of 0.68 kg (1.5 lb) per meal, packaging included.

The food is wet, sealed and eaten as it is

MREs are not irradiated. They are retorted, which the pamphlet describes as “a thermo-stabilization process using a combination of time, temperature, and pressure in a ‘pressure cooker-like’ apparatus.” The water stays in, so the main dish is eaten as it is.

To warm it, nearly every menu includes a flameless ration heater. “In an FRH, heat is produced by an exothermic chemical reaction that results from exposing a magnesium-iron compound to water.” Natick puts it at about 30 ml (1 oz) of water to raise the entrée by 37.8 °C (100 °F) in 10 to 15 minutes. The water goes into the heater.

The pamphlet guarantees a shelf life of three years at 27 °C (80 °F), or six months at 38 °C (100 °F).

Spain’s Army issues its own

The Ejército de Tierra’s individual combat ration, as described in an Army logistics presentation from 2013, is built from a breakfast, two meal modules (A and B) and two packs of ‘pan galleta’ (100 g) or a substitute, across five menus. The Army gives its daily energy as 3,446 to 3,608 kcal, and the same document says it should not be eaten for more than 30 consecutive days. It comes with a water-purifying tablet, a fuel tablet and a folding stove. A 2022 Directo al Paladar report adds that it keeps three years (breakfast a year and a half) and that most dishes are tinned, eaten hot or cold.

The same 2013 presentation lists two other rations. The emergency ration is a 425 g vacuum-packed metal box giving 1,050 kcal to cover 24 hours, with biscuits, chocolate, turrón and instant consommé among its contents. The light 24-hour ration weighs 1,200 g, gives 3,000 kcal over three meals, and is made of freeze-dried, dried and energy products.

The Army also buys freeze-dried rations: a supply contract for them was awarded in October 2024.

What else is sold as military or emergency rations

Other things sold under those names, with the maker’s or seller’s own figures:

• Compressed bars. The NRG-5 pack from MSI is nine bars, 500 g and 2,300 kcal, eaten as they are. The maker states a shelf life of 20 years from production when kept cool and dry.
• Self-heating wet meals. Forestia’s beef stroganoff, as a French retailer lists it, is a sterilised meal heated in 12 minutes in its own self-heating bag once water is added to a marked line.
• Freeze-dried pouches. Tactical Foodpack’s rice pudding has 474 kcal per 100 g dry, needs water and ten minutes, and the maker gives “up to 8 years from the production date”.

Wet keeps the weight, freeze-dried takes it out

Natick gives the pair of figures. The MRE weighs 0.68 kg for about 1,300 kcal and needs no water to eat. The US freeze-dried cold-weather ration weighs about 0.45 kg for an average of 1,540 kcal, and needs 0.83 to 1.18 litres (28–40 fl oz) of drinkable water and a heat source.

Freeze-drying, in the words of Virginia Cooperative Extension, “works by freezing a food product solid and then pulling a vacuum to remove water through sublimation”. Below a water activity of 0.6, the same source says, no microorganisms grow. For the longer comparison, see dehydrated vs freeze-dried food.

Genuine MREs come with a question mark

In 2006 the US Government Accountability Office reported that the Department of Defense had begun requiring “U.S. Government Property, Commercial Resale is Unlawful” on each case. Looking into MREs sold on eBay, it also wrote that “no statutes or regulations specifically prohibit the sale of military MREs”, noting that sellers possibly, “and perhaps likely”, got them through theft. Directo al Paladar’s 2022 report says Spanish combat rations also turn up in surplus shops and online, and quotes an Army colonel saying that should not happen. We have not checked whether US rules changed after 2006, nor Spanish or EU rules on reselling them; this is not legal advice.

Where our pouches sit

Ours are cooked dishes, freeze-dried, for people who are not soldiers: hikers, sailors, anyone keeping meals in the cupboard. They are not military rations and we do not call them that. They need water; most have a cold-water preparation, and each pouch states its own water and minutes.

The numbers

See the outdoor meals

Sources

• US Army Natick Soldier RD&E Center, DoD Combat Feeding Directorate, Operational Rations of the Department of Defense (PAM 30-25, 9th edition)
• US Government Accountability Office, GAO-06-410R, Military Meals, Ready-To-Eat Sold on eBay
• Ejército de Tierra, La alimentación en las operaciones
• Directo al Paladar, report on the Spanish Army’s combat rations, 2022
• BOE, contract award notice BOE-B-2024-42309
• MSI GmbH, NRG-5 technical data sheet
• Tonton Outdoor, Forestia beef stroganoff
• Tactical Foodpack, rice pudding with raspberries
• Virginia Cooperative Extension, FST-506, Factors that Impact Small-Scale Freeze Dryer Effectiveness

Accessed 6 November 2026.