An ice pack in a modern design, a waterproof (usually consisting of plastic ) bag of frozen water, refrigerant gel or other cool substance as content. Traditionally, the ice pack of flexible fabric ( water resistant fabric, rubber ) was manufactured and could by a screw with ( crushed ) ice or cold - are filled water - depending on the application and warm. The water could possibly be enriched with a saline solution.
Ice packs are (, boxing eg football ) used in both modern, static as well as in traditional, flexible design, among others, in medicine and in sports to cool minor injuries. Another medical application is the transport of animal or human organs in the context of transplantation. There, too, the use of ice packs is necessary.