Device to prevent hypothermia and increase cold-weather survival, utilizing the user's exhaled air

A hypothermia-prevention device, comprising:

• a three-way valve system having an inhalation port, an exhalation port and a respiration port;
• an in-valve located between the inhalation port and the respiration port, the in-valve movable between an open-inhale condition and a closed-exhale condition fluidly disconnecting the inhalation port and the respiration port, wherein the in-valve is configured to move to the open-inhale condition upon a negative pressure urged at the respiration port;
• an out-valve located between the exhalation port and the respiration port, the out-valve movable between an open-exhale condition and a closed-inhale condition fluidly disconnecting the exhalation port and the respiration port, wherein the out-valve is configured to move to the open-exhale condition upon a positive pressure urged at the respiration port, wherein the out-valve pivots away from the respiration port in the open-exhale condition;
• wherein the in-valve and the out-valve are biased in the closed-exhale condition and the closed-inhale condition, respectively, in the absence of positive or negative pressure at the respiration port;
• a mouthpiece fluidly connected to the respiration port;
• an intake housing removably secured to the inhalation port;
• the intake housing dimensioned so that a distal end thereof is spaced apart from the inhalation port by less than a diameter of said inhalation port;
• and
• an out-tube fluidly connected to the exhalation port.