Detailed Description  This Instand ice bag is a convenience product for fist-aid purpose as a cold compress. The pack is ready to use when you get it, it has an inner bag inside, once you find the inner bag then squeeze it, shake it heavily to mix the ingredients inside, then the pack will rapidly be cold to freezing point in 2~3 seconds, works for an hour, useful and amazing! It reduces pain, relieves swelling and expedites recovery for sprains, slight bumps and dislocation of bone joints. It can lower temperature from fevers, relieve pain and relieve itchiness from insect bites. It can reduce the incidence of bruising. Do not forget to wrap this pack with towel or cloth for insulation before using, to avoid frostbite. Pack is made of reliable safe material, non-toxic.