A large number of fatal accidents of fire-fighters during operations can be attributed to circulatory collapses due to cardiovascular diseases or heat stress. A recent project thus aimed at developing a highly functional, reliable and suitable system which can be used under different conditions such as common indoor operations. Measurement of vital signs, like ECG, breathing, and skin temperature, had to be combined with limited weight, acceptable skin comfort, affordable price, and speed and ease of dress and connection to the electronics in the fire-fighter’s jacket. The article gives an overview of technical and clothing technology aspects of the developed sensory shirt.