The New Premium 2.0 Heated Socks run on our PowerSheer Micro BT 3.7-Volt Lithium-Ion battery, providing long-lasting warmth for up to 10 hours on a single charge. Our Premium 2.0 Merino Wool Heated Socks blend comfort with Fieldsheer’s Mobile Warming Technology. Since 1978, Fieldsheer has designed and manufactured rugged, performance-driven gear for avid outdoor enthusiasts, motorcyclists, workers, and more. Our Premium 2.0 Merino Heated Socks take all-day comfort to the next level. Whether you’re in deep backcountry powder or on an early-morning job site, keep your feet warm and improve circulation to reduce stiffness, muscle fatigue, and soreness. With heavy cushioning in key areas and heating elements under the front of the foot, you can avoid discomfort and numbness that often occur in cold conditions. The Merino Wool blend is breathable, and the full-calf length provides comprehensive coverage. Seamless Bluetooth connectivity, powered by our proprietary MW Connect technology, controls four heat settings, ensuring you maintain complete comfort and control.