The over-the-calf Heavyweight boot socks are designed and constructed for winter use. These socks are designed to insulate against the cold with a fully cushioned inner protecting the foot on the top and the sole. The wool works to keep your feet dry and free of infections during those days when you don't want to be taking your socks off. Keep them on in your sleeping bag as these don't get smelly like synthetics.
These are socks you can rely on in the depths of winter.