Our men\'s insulated heated vest was developed to be ultra-lightweight with stellar heat retention but without the bulk . Constructed with an extra soft, fine denier nylon quilted shell with and filled with 80 grams of high retention insulation. Not only will the vest heat up on command, it will hold the heat better keeping you warm in even the coldest conditions. Can be worn by itself or as a mid-layer.
Note:
Battery is not included. It use the battery USB that you recharge cell phones with, we test it using the battery MI(Xiaomi) 20000mAh, you could order one on Amzon, in fact, all the battery with the output DC5.0V/2.0A are available.