For those workers who have to work outdoor for prolong periods of time, the intense summer heat may cause body exhaustion. Japanese manufacturer invented the “cool vest”, a mini air-conditioner is attached to a special gear, it is powered by battery and it is said could help to cool down body temperature. Besides the cool vest, outdoor workers are advised to take other precautions against heatstroke, such as avoiding the hottest hours of the day and drink more water.
