Smart fireman's jacket protects against heat stress

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Interval cooling conserves the air reserves in use

In case of heat stress—starting from 38.5 °C core body temperature—cognition and psychophysiology change. Affected individuals behave more risk-ready, impulsive, possibly make wrong decisions and overestimate their physical performance. Therefore, an innovative system was built into the jacket lining, which automatically cools the firefighter professional under the jacket as soon as the sensors strike. Because sweat evaporates better at low humidity, the idea is to slow down this process through air cooling. Therefore, the jacket cooling could contribute to improving the vital parameters of the firefighters and thus increasing the safety in use. Particularly challenging, however, was that all components must be robust and heat-resistant. In addition, a cooling technique had to be developed that does not waste the scarce resource air, which the firefighters carry in an additional compressed air bottle. This was achieved with interval cooling.

"Intelligent" firefighter's jacket proves itself in tests

The prototypes of this automatically cooling firefighter jacket were continuously tested under real conditions in the fire simulation system during development, as noted by the project participants. In the final study, 12 firefighters went into a fire container with smart firefighter jackets and a control group without this system under controlled conditions and completed a simulated fire use. Sensor data and feedback from the test subjects confirmed the effectiveness of the system.

The research work for the development of the "intelligent" firefighter jacket was promoted as a cross-state cooperation between Salzburg and Vorarlberg within the framework of the WISS2025 strategy of the province of Salzburg. Project partners were: Salzburg Research Research Society (project management), the technology leader for protective clothing Texport GmbH, the Department of Sports and Movement Science at the University of Salzburg, adidas, Digital Electronics and the Grabher Group.

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Date: 08.12.2025

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