The Hiking Medium sock is designed to fit perfectly into hiking boots and on cooler days. An insulating sock made from soft Merino wool. Hiking Medium comes with a Y heel and is anatomically designed for left and right, with comfortable knit on the shin and ankle section, so that it fits snugly around the foot and minimises the risk of blisters. Mesh fields in strategic areas provide good ventilation. The sock has a terry sole and heel, for excellent durability.