Heat...anywhere! Anytime! Simply flex the little metal disc, and they become hot instantly! Magic heat pad Gives instant heat up to approximate 130 degree F/ 54 C when activated, and Can be reused many times by following the instructions. It is very useful to the outdoor activities of all kinds such as camping, golf, hiking, ice fishing, hunting or spectator sports. You do not need to suffer cold or frostbite any more. For physiotherapy, it works especially effective on muscle relaxation, muscle aching, back aching, Cramps, arthritis pain, tenontodynia and etc. the heat pads are a novelty exciting useful health product and gadget. We can print your logo on the pad so that it is a great promotional item. OEM are welcome.