Now, ventilating jacket to help you beat the heat

AC in your jacket! Researchers have developed a lightweight air-conditioned jacket that keeps its wearer cool on hot days and during heavy physical exertion.
The innovative jacket developed by Wilhelm Stork, from the Karlsruhe Institute of Technology (KIT), weighs a comfortable a 200-grammes.
The jacket works through air circulating in its ventilation ducts that facilitates the evaporation of perspiration, lowering the body temperature, AAP News agency reported.
The cooling can be regulated with a mini-computer in the form of a wristwatch.
The prototype of the "KlimaJack" resembles a bulletproof vest and could keep police officers and bodyguards cool in sweltering heat.

The KlimaJack idea came to Stork during a European heat wave in the summer of 2003.

After a number of experiments, including with ice jackets, Stork concluded the best method would be to optimise the body's natural cooling mechanism.
However, the jacket is not perfect as the wearer's arms, legs and head remain uncooled.
The jacket makes a continuous whirring sound, similar to that of computers, which may be annoying for some people.
Besides the jacket, Stork has developed a chest strap with sensors that monitor breathing, heartbeat and physical activity.