Abstract: A hypothermia-prevention device is provided. The hypothermia-prevention device provides a three-port valve system having an inhalation port, a respiration port and an exhalation port, respectively wherein an in-take valve fluidly connects the inhale port to the respiration port and wherein an out-take valve fluidly connects the exhale port to the respiration port. The out-take and in-take valves are adapted to respond to the negative and positive pressure urged by way respiration of a user through the respiration port so that the exhale air is directed through the exhale port while colder inhale air is excluded through the exhalation port. The exhale port provides an out-tube for selectively directing the warmer exhale air to necessary body parts of the user.