The Fieldsheer powered by Mobile Warming heating technology Backcountry Men's Heated Jacket made with Primaloft synthetic down comes in 2 colors and 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.