Designed with the avid outdoor person in mind, Fieldsheers Smart Thawdaddy 2.0 Bluetooth Heated Vest delivers unparalleled performance with advanced features, including a compact design and a powerful heating system. Powered by Powersheer, the 7.4-Volt Lithium-Ion battery holds up to ten hours of power per charge delivering comfort no matter what nature throws at you and with a universal USB charging port. Our proprietary MW Connect app provides robust connectivity, and you can control your Mobile Warming settings seamlessly, ensuring you stay warm and keep going longer. Perfect as a mid-layer, the Thawdaddy vest is an ideal addition as a layering option for evolving winter conditions. The front zipper design 100% polyester shell provides protection from the elements while the Sweatsheer technology wicks moisture away from the skin, keeping you warm and dry for hours on end. 4 different heat settings allow you to maintain a comfortable core temperature, while the compact design makes this the perfect solution for keeping in a car, truck, motorcycle, or boat. | Mobile Warming Smart Thawdaddy 2.0 Heated Vest in Black | Size Small/Medium