They’re affordable. If you buy the warmers in bulk, they cost about 75¢ per pair. (A full box is about $30 for 40 pairs.) The HotHands Hand Warmers come two to a pack. Michael Hession/NYT ...

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 ...