Meet the Airable: a wearable cooler that keeps you comfortable on hot summer days. It gives you a fresh breeze at the touch of a button. You can run, play tennis, and do other exercises while wearing this. Airable has a magnetic fastener to stay put on your shirt. Its fans turn 180-degrees, so you can easily customize the airflow.
The device weighs only 5.7oz. It has its own battery but you can also use it with a power bank.