How much does an emergency bivvy bag weigh?

Between 80 and 150 grams—about the weight of a packet of crisps or less than your spare socks. They pack down to roughly the size of a can of soup, so they're genuinely easy to chuck in your rucksack and forget about until you need them.

When would I actually use an emergency bivvy bag?

The most common scenario is when someone in your group gets injured and can't walk out, so you're waiting for rescue while they lose heat fast. It's also useful if you're caught out by darkness, terrible weather, or any situation where you need to stop moving for a while in conditions where hypothermia is a risk.

Will I get wet inside an emergency bivvy bag?

Yes, you'll get damp from condensation because the bag isn't breathable—moisture from your breath and body builds up inside. That's still a worthwhile trade-off in an emergency since it keeps wind and rain out, but it's why these aren't suitable for planned camping trips.

Planning

Do You Need an Emergency Bivvy Bag for Hillwalking?

Emergency bivvy bags are lightweight, cheap, and recommended kit for hillwalkers. Here's why rescue guidance says you should carry one.

2 September 20268 min read