Discover the Mobile Warming Fieldsheer wool socks, designed to provide warmth and comfort all season long. Ideal for hunting, snow or winter sports, they provide up to 10 hours of warmth, with four adjustable levels. Targeted underfoot heating, arch support and heel and toe reinforcement ensure comfort and durability. They have a zipped battery compartment and a dedicated wire channel for clutter-free use. Included: one pair of socks, one Powersheer™ 3.7V (2200mAh) rechargeable battery and one Micro-USB cable.