The Turnout Gear from Viking you see here is the marriage of Thermal Sensor Technology (TST) and Smart Textiles, whereby firefighters will definitely find this smart uniform a boon to their everyday work. This suit is smart enough to visually communicate any critical hot spots on the suit itself so that the fireman will have greater situational awareness and not put himself in danger of burns. The LED display on the upper left shoulder glows to notify others whenever one might be in danger, while the sleeve’s LED lets you know if your mate is in a hot spot. The higher the mercury goes, the faster the LED will blink.

Source: Gearfuse