That depends on the kind you get, but most commonly, warmers last between five and eight hours. The other natural ingredients perform a number of different tasks: the salt works to spur the chemical reaction, the carbon is used to distribute the heat, and the vermiculite is used to insulate the warmth that’s generated. There are a few different kinds of hand and toe warmers, but the most common ones contain tiny pieces of iron, water, activated carbon, salt, a water reservoir, and a mineral called “vermiculite.” When iron is exposed to oxygen, it begins to oxidize and produce heat. Making sure to keep the cloth pouches sealed, shake each one so that all the contents mix together. When you buy your hand and toe warmers, they’ll come in a plastic wrapper, most likely with two pouches in each package. How do you activate a chemical heat pack?
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To help you understand how to use HAND AND TOE WARMERS, we’ve compiled answers to the most frequently asked questions about them. They give you a portable, one-time-use way to make sure your fingers and toes are toasty under your winter gear. These little pouches are great for cold-weather sports. You may have the best EXTREME-COLD-WEATHER GEAR, but it never hurts to take along hand and toe warmers that will bring your extremities back to life once you feel them stiffening up. When you're coming down the mountain on skis or snowshoeing through deep powder, the last thing you'll want to deal with is numb toes and fingers.
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