![]() In order for the reaction to occur, the hand warmer needs a supply of oxygen. ![]() Open the package and the heat pad immediately reacts to the outside air to provide several hours of heat. Small enough to fit inside a pocket or glove, pad measures only 2' x 3'. Non-toxic, all natural ingredients that are non-combustible. If you cut off the supply, the chemical reaction ceases. And to cut off the oxygen, all you need to do is put the hand warmer in an air-tight zip-lock bag. Once the small amount of residual oxygen in the zip-lock is used up, the hand warmer is essentially put on pause until you re-expose it to the air. (To minimize the amount of oxygen in the bag, zip it nearly closed, suck out the remaining air with your mouth, and then quickly seal it shut.) Grabber Hand Warmer Maximum Temperature: 158 F (70 C) Ingredients: Iron, water, cellulose, activated carbon and salt Country of Origin: USA Harmonized. I recommend using thicker, more durable freezer zip-lock bags for this purpose, especially if you’ll be stuffing it in your backpack when not in use. Our air-activated Grabber Hand Warmers keep hands and fingers toasty for up to 10 hours No shaking or kneading is required just open the package and put the 'Original' Warmers in your glove or pocket for a few minutes to start the process. Even a small hole can let in sufficient oxygen to keep the reaction going and render your hand warmer cooked. Keep in mind that this technique doesn’t actually cause the hand warmer to produce more heat-there’s a finite and specific amount of potential energy contained in a hand warmer that can’t be increased. ![]()
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