- Warm Caress is a unique 'Forced Air Warming System' for prevention of Hypothermia. It comprises of a Heater/ Blower Control Unit which fills uhot air into a thermal conductive patient overlay blanket. The system of transfer of heat is called 'Convection' and is one of the safest mode of transfer of heat as the patient is completely insulated electrically from the Control Unit. Moreover, it has a highly precise control unit capable of delivering air at temperatures which is +/- 0.5 degrees from the desired temperature.