In fact, heating equipment is essential for winter sports enthusiasts. And a portable self-heating hand warmer is undoubtedly a very good choice. When your hands get cold, you can put it into your glove or pocket to keep warm. So how do these hand warmers work?
First, the materials of hand warmer include iron powder, super absorbent polymer, water, vermiculite, activated carbon and salt. So once the outer package is opened and exposed to the air, the iron powder will undergo an oxidation reaction, and then it begins to release heat within 1~2 minutes. After this process is all completed, the hand warmer can be thrown into the trash as regular garbage because natural ingredients are environmentally safe.
Second, if you look carefully, you will find that there are some very tiny holes in each hand warmer, which allow oxygen to enter and react with iron powder. The size of these small holes also determines the heating time and stable temperature of the hand warmer. Their maximum heating temperature can reach 68℃(154.4℉), and average temperature can reach 55℃(131℉).
Besides, our hand warmer can really provide up to 12 hours of warmth in cold winter, enjoying endless fun in winter sports, like skiing, hunting, fishing, etc. But what if you can not use the long heat time for 12 hours? Do not waste the remaining heat due to a short-term heating use.
As mentioned above, this is also why we can pause the heating at any time. Only when it comes into the air, it will generate heat. So when you no longer need it for heating, just seal it up to insulate the air, it will stop heating. And please put it back into the air when you use it again.
With this hand warmers, you do not worry about frostbite, and still can have fun in the cold winter!