Utilizing our new Powersheer® Micro 3.7-Volt Lithium-Ion battery, our new Thermal Heated Socks provide long-lasting warmth for up to 10 hours on a single charge. Our Thermal Heated Socks are a thoughtful blend of comfort, cost, and Fieldsheer’s® Mobile Warming® Technology. Since 1978 Fieldsheer has been designing and manufacturing rugged, performance-driven gear for avid outdoor enthusiasts, motorcyclists, workers, and more. Our Thermal Heated Socks take all-day comfort to the next level. Whether you’re in deep backcountry powder or an early morning job site, keep your feet warm and improve circulation to avoid stiffness, muscle fatigue, and soreness. With heavy cushioning in key areas and heating elements under the front of the foot, you can avoid the discomfort and numbness that come with being outside in cold conditions. The cotton/poly blend is breathable, and the calf length provides full