Airflow cover for controlling body temperature

A cap for controlling the temperature of the head of a reclining person, comprising:

• an inflatable annular tube forming a central opening for encirclingly fitting to the head of a person reclining on a support surface and for being inflated to lift said head from said surface;
• a sheet of material attached to one side of said annular tube over said central opening to form a recess for receiving substantially the top of a head when said head extends into said recess through said central opening;
• an outer surface on said tube;
• an entry port on said tube outer surface for admitting a temperature-controlled, inflating medium into said tube;
• an inner surface in said tube's central opening;
• exit ports in said inner surface for, when said tube is inflated with an inflating medium, conducting said inflating medium from said tube into said recess;
• and
• an exit port, substantially smaller than said central opening, in said material sheet for venting an inflating medium from said recess to an external environment.