Sony's wearable "air conditioner," the Reon Pocket, is a body-cooling device about the size of a smartphone.
You simply put it in a pocket on a specially designed T-shirt, and Sony says it will lower the temperature of your back 23 degrees.
The temperature is controlled through an app on your phone.
The device will cost about $117.
The product is still in the crowdfunding stages and will only be available in Japan when it first comes out.