Nylon,Polyester LIGHTWEIGHT INSULATED DESIGN - 100% nylon outer shell with PrimaLoft synthetic down insulation made with recycled materials. Features two zippered waist pockets and one internal storage pocket for everyday convenience. ADVANCED HEATING SYSTEM - 7.4V heating system with three panels (2 chest, 1 back) using ultra-fine fiber heating elements for even warmth distribution. RECHARGEABLE BATTERY POWERED - Includes a 7.4V 2200mAh lithium-ion rechargeable battery engineered exclusively to power compatible Fieldsheer heated garments. CUSTOMIZABLE TEMPERATURE CONTROL - Choose from four heat settings using the integrated touch control button with LED indicator or adjust remotely through the MW Connect app (iOS and Android compatible). ALL-DAY COMFORT & PERFORMANCE - Wind- and water-resistant construction with breathable lining and anti-static technology for reliable warmth in cool to moderate cold conditions. The Women’s Backcountry Heated Vest delivers lightweight insulation and advanced heating performance in a versatile design suitable for layering or standalone wear. Built with a durable nylon outer shell and PrimaLoft synthetic insulation, this vest provides warmth without bulk while maintaining breathability and comfort. The integrated 7.4V heating system features three strategically placed panels across the chest and back for balanced warmth. Powered by a rechargeable 2200mAh lithium-ion battery designed specifically for Fieldsheer heated garments, the vest delivers up to 10 hours of heat on low settings and approximately 2.5 hours on high. Temperature can be adjusted using the built-in waterproof touch control button or the MW Connect Bluetooth-enabled app for convenient control and real-time battery updates. The included USB charging cable is used to recharge the battery pack.