However, be aware that the metal covering over the heater could still be hot and potentially melt your sleeping bag if it falls on top of it. If you're staying in a bigger space or have a higher ...

Versus a space heater–electric, propane, diesel or whatever–the pad is able to provide heat more effectively, more efficiently, since it’s warming only your body and sleeping bag.

She attached it to my dad’s matching bag, and the dog—a living space heater—curled up blissfully between them. I survived the trip—my hacked-together sleeping solution was warm enough.

To solve this problem, a US firm has designed a heated sleeping bag that promises to keep you toasty when the last embers of campfire have died down. The firm is so confident in its design ...