The Fieldsheer Peak Bluetooth Heated Vest is a low-cost unisex Heated Vest that is favored by many for its light design that allows it to function as either an outer shell or a base layer. Engineered to keep outside elements out, the Peak Heated Vest is constructed with Windshark, a Fieldsheer fabric technology designed to take on moderate weather, and a comfortable 4-way stretch material. Look to this highly breathable lightweight Heated Jacket to provide a water- and wind-resistant shell. The mid-weight Peak BT Heated Vest is thick enough to be worn as your outer layer and thin enough to be used under a larger ski Heated Jacket or heavy work coat. 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. Throw it on under your camo, snow jacket, uniform, or just wear it to the next ball game. The Peak BT Heated Vest is ready for any event.