This is a close-fitting activity sock with superior woollen comfort to give a little extra insulation on cold days. If you’re going on a long hike, or have new shoes, you should consider wearing a Hiking Liner sock underneath, to minimise the risk of blisters. This will also provide extra insulation. Outdoor Medium has comfortable knit on the shin and an elasticated calf and instep section to ensure an excellent fit. The sock has a terry sole with nylon reinforcement, to provide good wearing strength.