The Fieldsheer powered by Mobile Warming Technology Bluetooth®-enabled Primer men's heated baselayer pant is designed for the outdoor enthusiast. From skiing, hunting, hiking to running or just working outdoors, the Primer pant complements your outerwear. The Primer Pant is made from a four-way stretch anti-odor polyester-spandex blend that provides a comfortable next-to-skin feel. Flat-lock seams, moisture-wicking mesh liner, and side-stretch panels conform to your body and allow for maximum body movement. The Primer heated baselayer has integrated, concealed heating panels powered by sturdy yet light-weight 7.4-volt fine heating coil system. The 7.4-volt system has three heating elements, one on lower back and two on the thighs, that add heat to critical areas that keep your legs warm. The Primer’s 7.4-volt heating system can provide temperatures ranging from 135°F on high to 90°F on low. On high, expect 2.5 hours of heat, and on low, the Primer can provide heat for up to 10 hours! The Primer Pant has 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, the incorporated Bluetooth® control with an MW Connect™ app. Through the MW Connect™ app, you can quickly toggle through all connected Fieldsheer® devices and adjust individual heat levels to your liking. MW Connect™ allows you to get real-time updates on battery levels and update your garments when new firmware becomes available. All day, any weather, the Primer’s technical performance and heating capabilities make it ideal for when you’re getting active in the winter months.