The Mobile Warming Women’s Backcountry Heated Vest is constructed with a lightweight water resistant 100% nylon outer shell fabric, a 100% Primaloft(r) Down Polyester Filled Core and a 100% Polyester anti-static Inner Liner. It features 2 waist hand pockets, internal zippered pockets and a stow-away bag. The integrated, concealed heating panels are powered by a sturdy yet light-weight 7.4volt Far-Infrared Heating System. There are three heating elements, one on the upper back and two on the chest, that add heat to critical areas that keep your core warm. It can provide temperatures ranging from 135°F on high to 90°F on low. On high, expect up to 2.5 hours of heat, and on low for up to 10 hours. There are two ways to adjust the temperature. First, the built-in touch control button. With a simple button push, you can select from four heat settings. Second, you can have Bluetooth control with a MW ConnectTM app. Through the MW ConnectTM app, you can adjust individual heat levels to your liking. MW ConnectTM allows you to get real-time updates on battery levels and update your garments when new firmware becomes available. The vest comes with the 7.4V (2200 mAh) Lithium-Ion Battery and a micro USB charging cable. You can expect up to 10 hours of power per charge.