Japanese turn to wearable tech to beat the heat

Selling jackets with built-in fans, neck coolers and T-shirts that feel cold, Japanese firms are tapping into a growing market for products to help people handle the summer heat. "Just like you feel cool when you are at home with a fan, you feel cool just by wearing (the jacket) because the wind is blowing through your body all the time," he said. At another booth, Tokyo-based company Liberta had a series of clothing including T-shirts and arm sleeves using prints that make users feel cool -- especially when they sweat. The prints use materials such as xylitol that feel cool when reacting with water and sweat, they said. Another visitor, Shoma Kawashima, wore a wearable fan around his neck to stay cool under the blazing sun.