Abstract: A device for heating or cooling a body of a user is provided. The device includes a thermoelectric module, a heat sink thermally coupled to the thermoelectric module, a wetting material in thermal communication with the heat sink, and a controller for cycling the thermoelectric module in accordance with a duty cycle. Additionally, a method of heating or cooling a portion of a body of a user is provided. The method includes cycling electrical power to a thermoelectric module at a duty cycle, transferring heat from the thermoelectric module to a heat sink, and evaporating a liquid from a wetting material disposed on the heat sink. The evaporated liquid enters the surrounding atmosphere.

Abstract: A process and system for heating or cooling comprising a ihermoelectric unit having a cooling surface and a heating surface, the cooling surface being thermally insulated from the heating surface is provided. A heat sink is thermally coupled the thermoelectric unit and a wicking material operatively coupled to the heat sink. The wicking material may be substantially saturated with a mixture of water and DNA to dissipate energy. An apparel item incorporating the system for heating and cooling is also provided.