The Mobile Warming Men's Vinson BT Heated Jacket is constructed with Windshark, a comfortable 4-way stretch material. Windshark is ready to take on the elements. Engineered to keep outside elements out, the Vinson BT Heated Vest is constructed with Windshark, a 4-way stretch softshell fabric that offers comfort, flexibility, and protection from rain, water, and wind. The mid-weight Vinson BT Heated vest is thick enough to be worn as your outer layer and thin enough to be used under a larger ski jacket or heavy work coat. Look to this highly breathable, light-weight vest to provide a completely waterproof and wind-resistant experience, including a zippered waterproof and taped seam chest pocket to keep your smartphone dry in the wettest conditions. The Vinson BT Heated Vest has integrated, concealed heating panels powered by sturdy yet light-weight 7.4volt Far-Infrared Heating System. The 7.4volt system has three heating elements, one on the back and two on the chest, that add heat to critical areas that keep your core warm. The Vinson BT 7.4volt heating system can provide temperatures ranging from 135°F on high to 90°F on low. On high, expect up to 3 hours of heat on high, and on low, the Vinson BT can provide heat for up to 10 hours! The Vinson BT 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, we've incorporated Bluetooth control with our MW Connect™ app. Through the MW Connect™ app, you can quickly toggle through all connected Mobile Warming 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. The Vinson BT Heated Vest is ready for any weather, and if outdoor conditions get cold, look no further than the Vinson BT Heated Jacket.