To make a safe, portable form of heating to take to the rest of the team working up on the glacier. All combustion reactions (such as the burning of coal) are exothermic. Incredibly, the reaction ...

Still looking? See more results on Wirecutter. We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Liz Zack On July 30, 2026, the ...

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 people ...