Wendu is the wearable capable of switching temperatures from 35 to 15 degrees Celsius in just a couple of minutes.Wendu is a T-shirt which is made of high conductive fibre and this is connected via bluetooth to a your phone,tablet or a smart watch and you can regulate the temperature with it.
You can just activate Smart mode on the app and the T-shirt will automatically sense the surrounding temperature and set the T-shirt temperature accordingly.
This T-shirt is washable it is very comfortable also.The price of this Tshirt is also not very high ,its around 100$.You can order one for youself from Kickstarter
SOURCE: Wendu , Kickstarter