What Actually Belongs in a 72-Hour Bag

A 72-hour bag is built on the assumption that help, power or normal supply chains might be disrupted for three days, not three weeks. That framing changes what's actually worth carrying — it's less about long-term survival gear and more about bridging a short, uncomfortable gap safely and calmly.

Plan for roughly 1 litre per person per day as an absolute minimum, more in heat or if physically active. That's 3 litres minimum for 72 hours per person, which is already heavy — pairing a smaller carried amount with a reliable purification method, as covered in emergency water purification, is usually more practical than trying to carry it all.

A single warm layer, a compact sleeping bag or blanket rated to conditions you're likely to face, and a lightweight tarp or bivvy. Wet, cold conditions kill faster than dry cold ones, so waterproofing matters as much as insulation — see five tarp shelter configurations for options that pack small.

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   Start with water and medication before anything else. These are the two categories where running out has immediate, serious consequences.

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   Add one complete change of weather-appropriate clothing per person. Include a warm layer even in summer bags — nights and unexpected exposure can both drop temperatures fast.

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   Pack a basic first aid kit sized to your household. Follow the reasoning in a first aid kit that works rather than buying the first pre-made kit you see.

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   Include copies of key documents in a waterproof pouch. ID, insurance policy numbers, emergency contacts and a small list of medical conditions per family member.

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   Add lighting, a way to charge a phone, and a whistle. A headlamp beats a phone torch for battery life; see keeping your phone alive during a blackout for realistic power planning.

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   Store the finished bag somewhere reachable in under two minutes. If it's in a loft behind boxes, it won't get grabbed under stress — the same logic behind evacuation checklist: the first 15 minutes.

Calorie-dense, shelf-stable food that requires no cooking or water to prepare covers the basic need without extra equipment: nut butter, dried fruit, crackers, tinned food with a ring-pull lid. If you do bring a stove, it is strictly for outdoor use — burning fuel indoors, including in a tent or vehicle, produces carbon monoxide that can be fatal without warning.

Spare house and car keys, a small amount of cash, and a paper map of your local area in case digital navigation and networks are both down. These cost almost nothing to include and solve real problems that gear alone doesn't.

The most common mistake is building a bag once for a magazine-cover scenario and then never adjusting it as family needs change — a baby's bag needs completely different contents to an adult's, and both need revisiting as children grow. The second is over-packing tools and under-packing water and medication, which are the two things that actually run out fastest.

It isn't a substitute for a home emergency plan, evacuation routes, or knowing your area's specific risks — pair it with the wider planning in the 72-hour emergency plan. It also isn't designed for indefinite survival; if a disruption runs past three days, you need resupply, not a heavier bag.

Official household emergency planning: ready.gov and drinking water safety: WHO drinking water.