Emergency Zone ReDo Reusable Long Lasting Pocket-Sized Hand Warmers. Non-Toxic. Great for Cold Weather, Heat Therapy, Joint, Back, and Muscle Pain, Cramps, Arthritis. RESUSABLE: Why keep buying new hand warmers when there is a better, more cost effective option? With Emergency Zone ReDo Reusable Hand Warmers you can simply reuse the same hand warmer over and over again. On occasion the product can be activated in transit and arrive crystalized. If that is the case simply boil to reuse. Directions: Wrap hand warmer in cloth (or place a rack on the bottom of the pot), place in boiling water, keep it immersed until crystals disappear, wait for it to cool. LONG LASTING: We recommend wrapping your hand warmer with a cloth during use as it extends the life to up to 2 hours. Unwrapped will give you 35-45 minutes of intense heat. SIZE: These non-toxic hand warmers are available in both small 3 x 5 and large 4 x 6 sizes. They also produce less waste than traditional hand warmers. DIRECTIONS: 1. Flex the metal chip inside to make it snap until the liquid begins to crystalize. 2. Gently knead the hardening liquid. 3. Wrap in cloth or keep in your pocket to prolong heat. 4. Enjoy the warmth! 100% MONEY-BACK GUARANTEE: If for whatever reason you are not 100% satisfied with your hand warmer, please contact us and we will make it right by you.