A process and a device are provided for monitoring the status of the body fluids of a person. The device includes a piece of clothing with ventilating ducts, a first temperature sensor (6) and a first moisture sensor (11) for measuring the inlet flow (7) into the piece of clothing and a second temperature sensor (17) and a second moisture sensor (12) for measuring the outlet flow (10) from the piece of clothing. A pressure sensor (13) is provided sensing pressure in the inlet flow. A fan (5) or a compressed-air source is provided for transporting the cooling air into the piece of clothing. A measuring and analyzing unit (14) is connected to the sensors and the fan (5) or the compressed-air source.
