Hand warmers have a simple job to do, and while they can’t replace your own body (Eat! Hydrate!) as a heat source, they can provide a little relief when you need to be out in the cold and ...

The first 'reaction' that we tried for our hand warmer involved dissolving potassium carbonate (K 2 CO 3) in water. Potassium carbonate is one of the chemicals left behind in the ashes of burnt wood.

Here at Backpacker, hand warmers have a fan club. When I polled my colleagues and other staffers from Outside about their favorite pieces of gear for winter hiking and camping, three different ...

But not so with the Go Warmer. This lozenge shaped device is not ... You can hold in in your hand, put it in your pocket, maybe even sit on it if you’re particularly daring.