The Allon is a revolutionary system that controls your patients temperature throughout all stages of surgery. The system consists of an algorithm driven heat pump that supplies warm or cold water to the ThermoWrap™ garment worn by the patient. The water temperature is determined as a function of the actual patient temperature and desired set point temperature. Core and surface temperature sensors provide continuous feedback to the central unit in order to regulate the heat pump and thereby the patient temperature. The anesthesiologist chooses the exact desired core temperature and the Allon does the rest.