The Hrkila Heat camo jacket is a lined, camouflaged jacket with built-in heating membranes that you can set to exactly the temperature you desire. The jacket can also be packed away into the supplied drybag, so it is easy to carry with you. This makes it an excellent choice for both a superb midlayer under a shell jacket and an outer layer on its own, for a wide range of hunting and outdoor activities in the cold weather. The jacket is powered from a power bank through a USB connector. A power bank is not included with the jacket.