Search "72-hour bag" and you'll find lists with eighty items on them — water filters, multiple knives, fishing line, a hand-crank radio, enough gear for a week in the backcountry. Most of that never gets used, and a bag nobody wants to carry is a bag that stays in the closet.
The actual job of a 72-hour bag is narrow: get you and your household through three days if you have to leave home fast, or shelter in place without power or water. That's it. Once you're packing for that job specifically, the list gets a lot shorter.
Start with the four things you can't improvise
Water, a way to purify more of it, a way to stay warm, and any medication you take regularly. Everything else on a good list is either a backup for one of these four, or a convenience. That's not a criticism of the convenience items — some of them matter — but it's the order to think in.
Weight is the real constraint most lists ignore. A bag that's genuinely useful for three days, packed by someone who has to actually carry it — possibly while also carrying a kid — tops out well under twenty pounds. Past that, people leave the bag behind exactly when they need it most.
What to actually pack
- Water — 2 liters, plus purification tabletsEnough to get you to the next water source, not enough to carry alone for three days.
- A 3-day supply of your actual medicationsRotate this every few months — it's the item most likely to quietly expire.
- One warm layer and a compact emergency blanketWarmth, not a full change of clothes — that's what the weight budget goes to.
- A headlamp and a way to charge a phoneHands-free light matters more than people expect until they've used one.
Everything past this core is genuinely optional, and what you add should depend on your household — formula and diapers if you have a baby, a spare pair of glasses, a printed list of emergency contacts. The point isn't to match someone else's list exactly. It's to have thought it through once, calmly, instead of trying to think it through while you're already out the door.