The Hiking Medium sock is designed to fit perfectly in hiking boots and can be worn on cooler days. An insulating sock made from soft merino wool. Hiking Medium has a Y-shaped heel and is anatomically designed for left and right feet, with comfortable knit at the shin and ankle area so that it fits snugly around the foot and minimizes the risk of blisters. Mesh panels in strategic areas ensure good ventilation. The sock has a terry sole and heel for excellent durability.