The Men's Shefford Heat Panel Vest with 4,000 mAh Power Bank delivers comfort and warmth like nothing else in our line. The Shefford features lightweight, water-repellent warmth while the power bank controls the temperature of the vest by powering interior heat panels at the chest and back. Three temperature settings controlled at the touch of a button: Blue = Low (100°F), White = Medium (113°F) and Red = High (131°F). This kit includes the 7121-40 Leed's UL Listed Abruzzo 4,000 mAh Power Bank. Power bank will provide heat for approximately 2.5 hours on High. Included power bank will be shipped blank. For a decorated option, power bank and vest must be purchased separately. Shefford Vest and Power Bank packaged separately.