The cooler suit was an Air Force sponsored project. The intention was to make a self contained cooling suit that would help the fighter pilots keep cool in there cockpits. The suit is basically a miniaturized version of what is in modern vehicles. We used R134a refrigerant in an evaporative process to cool a reservoir of water. The chilled water is then ran through tubes sewn into the shirt the user is wearing. The suit can cool the user up to 20 degree cooler than ambient temperature.