The CEP Outdoor Light Merino Mid Cut Sock combines CEP's unrivaled compression technology and Merino wool comfort in a crew length design. The unique blend of nylon, spandex, and wool combine to create a durable, effective partner for your feet and boots no matter how far your adventures take you. The lightweight design ensures a great fit in even the tightest boots and shoes. Our unique dynamic compression profile will improve circulation to the foot by stimulating blood flow, and reduce swelling over the course of the day. Wool is one of Mother Nature's best fibers; it provides both insulation and cooling, and it can prevent cold feet by absorbing moisture.Strategically placed padding on the ankle bones and over the first metatarsal head adds extra cushion and comfort for even the longest days.