Click It Hot Cold Snap It Reusable Gel Heating Pad for Pain Relief Pocket Hand Warmer Assorted Colors 5 Pack

HOW IS THE HEAT PRODUCED? Bending or “clicking” the coin located in the liquid pad causes a reaction to occur which makes the liquid crystallize and this crystallization is what causes the heat to occur. Important note: After the liquid has crystallized make sure you massage the pad to make it soft and pliable. This will cause the pad to stay hot for the specified amount of time depending on its size. This crystallization ALWAYS occurs at a temperature of 54C (130° F). The pad will not activate if it is above this temperature. Once activated, the heating pad has available to it a predetermined amount of energy. It will use this energy to increase the temperature of the pad to 54 o C and use whatever is left to maintain that temperature. This ability to produce heat for a period of time is accomplished because all of the liquid does not crystallize immediately. Molecules that were not required to heat the pad to its maximum temperature will remain liquid, and crystallize as required, to maintain the maximum temperature. This means that a pad that is warm will maintain its maximum temperature longer than one that is cold.

• LONG LASTING INSTANT HEAT PACK - Click hand warmer uses unique technology to release heat from safe sodium acetate solution without electricity. After activation with a single tap on the metal plate, the heat pack changes from liquid to solid and reaches around 130 degrees in a few seconds, and can last for about 1 hour, depending on the size and insulation.
• VERSATILITY - These heat pads are soft and bendable, making them easy to fit even in the most complex areas. In addition to using them as hand warmers, you can also use them to relieve arthritis pain, muscle pain, tendinitis, shoulder and neck pain, back pain, knee pain, and menstrual pain.
• EASY TO USE - Can be placed in the refrigerator for cold therapy. Do not put in freezer. For heat, just bend the inner disc, and it can be heated to 130 degrees immediately in 3 seconds. After cooling, put it in boiling water and boil for 5 minutes, put a rag underneath, after the hot compress bag returns to its liquid state, take it out and let it cool for repeated use.
• SAFE AND REUSABLE - This reusable hand warmer is made of environmentally friendly, high-quality, medical-grade materials and is resistant to wear. The hand warmer can be reset by boiling in water to liquefy the crystals. For best results, please cool down and store in liquid form.
• EMERGENCY NECESSITIES - The reusable hand warmer designed for body comfort, pain relief and instant heat. The portable long-lasting instant heat pack can be used many times for family first aid, camping, outdoor sports, emergency equipment, hiking and sports events.