Freeze-dried and dehydrated meals are the backbone of most trips, and a few things determine whether they are edible.

Water Temperature and Time

Most meals specify boiling water and a stated waiting period, and both matter.

Cooler water rehydrates more slowly and unevenly, leaving hard fragments. Cutting the time short does the same.

At altitude, where water boils cooler, allow longer than the packet says.

Getting It Right

• Measure the water rather than guessing
• Stir thoroughly, including the corners of the pouch
• Seal it and insulate it while it stands
• Stir again halfway through the wait
• Allow extra time in cold or at altitude

Pots that boil efficiently, of the kind catalogued at alocs-us.com, matter here because the whole method depends on getting water genuinely hot rather than merely warm.

Insulate While It Stands

The step that makes the difference in cold weather. A pouch left in cold air loses heat fast and rehydrates poorly.

Inside a jacket, in a sleeping bag, or wrapped in a hat. Some people carry a simple insulated cosy, which weighs almost nothing.

Cook in the Pouch or the Pot

Pouch cooking means no washing up, which matters where water is scarce and where you must pack out waste.

Pot cooking gives more even results and lets you adjust, at the cost of cleaning.

Home Dehydrated Food Differs

It generally needs longer and often actual simmering rather than steeping, since it is dried differently.

Test recipes at home before relying on them.

Pack Out Everything

Pouches, fragments and leftover food. Never buried.

Carry Something Cold

For a day when the stove fails.

Stir the Corners

Dry pockets in the corners of a pouch are the commonest complaint about these meals.

Add Extra Water at Altitude

Where cooler water rehydrates less effectively.

Test at Home

A meal you dislike is one you will not eat when you need the calories.

Insulate the Pouch

Which matters more than any other technique in cold weather.

Pack the Pouch Out

Including any fragments.

Home-Dried Food Needs Simmering

It is dried differently from commercial freeze-dried and rarely rehydrates by steeping alone.