Experience soothing warmth and comfort on the go! Keep toasty warm this winter on hikes, on the sidelines or even inside your home! Simply plug vest in to any phone charger and select from three instant heat settings. Vest features three warming zones (on the back and chest) to deliver cozy comfort during your favorite fall and winter activities. Unisex 3 Heat settings for the right warmth for your comfort Pockets to hold and plug in portable charger Powered by any portable charger/power bnk Three warming zones (back, left and right chest) Operation instructions are included inside the vest Hand wash and air dry