Since the title caught your attention, it is exactly what it sounds like. It is an air umbrella that will keep you from getting wet during rainfall not matter how hard it is falling down. As long as you have the air umbrella and sufficient battery juice, there is nothing to worry about.
The air umbrella is an invisible umbrella that is equipped with a motor driven fan that forms an invisible air shelter and it makes sure that the person holding it does not get wet during rain. It is equipped with a battery that can last up to 3 days in standby and up to 30 mins of use.