The Mobile Warming® Backcountry Women's Heated Jacket made with Primaloft® synthetic down offers a low-profile 7.4-volt battery. With Waterpell® technology, water bounces off the garment. Primaloft® is a down alternative made from recycled materials into ultra-fine insulative fibers. The Backcountry is stylish enough to wear on its own during day-to-day use, but light and amply compressible to also wear as a base layer under your favorite rain or snow Heated Jacket. The Backcountry 7.4-volt heating system can provide heating temperatures ranging from 135°F on high to 90°F on low. On high, expect up to 2+ hours of heat, and on low it can heat up to 10 hours! Temperature control is simple with 2 ways to adjust the heat. First, the built-in waterproof touch control button.  With a simple button push, it lets you choose from 4 instant heat settings with multi-colored LED indicator. Plus, we’ve incorporated Bluetooth® control with our proprietary, free to download via App Store® or Google Play Store®, MW Connect™ app.  Through the free MW Connect™ app, you can quickly toggle through all connected Fieldsheer® powered by Mobile Warming® technology garments and adjust individual heat levels to your liking. MW Connect™ app allows you to get real-time updates on battery levels and update your garments when new firmware becomes available.. The Backcountry comes as a complete package with a 7.4-volt battery, and charger. The Backcountry provides instant heat when the weather turns cold, keeping you outdoors and enjoying your favorite activity.