SealSkinz’s thinnest waterproof sock, the Mid Calf Sock is ideal for running, cycling and walking throughout the year, and especially in warmer weather. Exceptionally thin and lightweight with elasticated instep support makes these socks ideal for use with close fitting running and cycling shoes. These socks also feature, a fine Merino wool inner for great comfort and excellent wicking performance. The Mid Calf Length socks combine a comfortable and highly breathable inner layer, a waterproof mid layer and a highly durable outer layer to create a comfortable, breathable, waterproof and durable sock. Perfect for keeping your feet dry and healthy.