Now, AC jacket that keeps wearers cool on hot summer days

A engineering professor in Germany has developed a 200-gram jacket that keeps its wearer cool on hot days and during heavy physical exertion.

Wilhelm Stork, from the Karlsruhe Institute of Technology (KIT), invented the jacket that looks like a bulletproof vest, News.com.au reported.

The air circulating in the ventilation ducts of the KlimaJack facilitates perspiration's evaporation that helps lower body temperature.