The TST Cooling vests have energy elements consisting of PCM, phase changing material, which absorbs excessive heat from the body and keeps it in the comfort zone. When the absorption has stopped, after 2 to 8 hours, the vest can easily be recharged in room temperature. A big favour is, that you don't have to add any other energy!
Cooling vests are, for example, used by fire fighters, athletes and racing drivers but also by people with certain neurological handicaps. The cooling effect is good, both for good performance and for the function of the body!