If you are the type of person who suffers cold during the winter and is looking for an eco friendly solution to disposable warmers, the Heat It Up reusable heat pack is perfect for you. Thanks to their size that allows you to put them in your coat pocket, they are the perfect complement to your gloves on those cold mornings on the way to work, the children's school, walking the dog, or shopping. Even if you are on vacation with your family, going camping, fishing, skiing, or hiking in the forest, they are great for warming your hands or body. All you have to do for its activation is click on the metal disc inside to start a thermo reaction that crystallizes the gel and heats it to a temperature of 129° F in just seconds and stay warm for 30 minutes. A few reasons you will love Heat It Up reusable heat pack: No power, cords or microwave needed, easy to activate, really fast instant heat, reusable and eco friendly, perfect size so you can carry them in your pockets, backpack or bag, flexible and soft, manufactured with medicinal quality, and arrives ready to use. The Heat It Up reusable heat packs box contains 8 heat pads, 4 rectangle shaped and 4 round shaped. Also includes a free cloth bag for easy transportation. Each instant hot packs contains a solution of water and food grade sodium acetate, so even if they broke, are safe for children and pets. Hot uses: warm your hands and body, calm and relax muscles, relieves muscle pain, treats arthritis, stiffness and headaches. Cold uses: Contusions, bruises, sports injuries, inflammations, sunburn and fever.