Detailed Product Description 1) can heats instantly to a safe present temperature and is completely re-usable . 2) can be used for the treatment of sports injuries , arthritis pain , back pain , sore neck , menstrual cramps , tooth aches , hypothermia , sprains , growing pains , TMJ, or for any of the many ailments where heat will provide relief . 3) also portable so that they maybe used to keep ...