Frequently asked questions
Can you use a warmer in a sleeping bag?
Yes, and many campers do. Slip a body warmer or an 18-hour Mega inside the bag against a base layer, keep it on fabric rather than skin, and make sure air can reach it. It will run through the coldest part of the night.
How long do camping warmers last?
It depends on the shape: hand warmers run about 7 to 10 hours and an 18-hour Mega covers a full night. Most campers bring a mix, with a short warmer for the day and a long one for the tent.
Do the warmers need to be kept dry?
Store the sealed pouches somewhere dry and they keep for years. Once opened, a warmer works best with airflow, so it does not do well sealed inside a wet pocket. Keep spares in a zip bag in your pack.
Can you fly with warmers for a camping trip?
Yes. Air-activated warmers travel in carry-on and checked bags with no restrictions, since they hold no batteries. They are an easy thing to pack for a fly-in trip.