Abstract: A device which is shaped like a mitt or glove and has surfaces for covering the palm and back of the human hand. Each of the palm and back surfaces is formed as a plenum which is filled with a heat exchange material. The heat exchange material is selected to provide cooling over a reasonably extended period of time, at an appropriate therapeutic temperature. The heat exchange material is preferably a phase change material such as a paraffinic phase change material having a phase change temperature on the order of 50.degree. F. However, other temperatures and materials are contemplated. The mitt or glove is made of a flexible plastic sheet material such as a tripolymer material or polypropylene. The mitt is formed of four die cut sheets of the plastic sheet material which are shaped in the pattern of the outline of a human hand and forearm. The patterned sheets are stacked together and heat sealed together along their periphery.