A premium quality, ergonomic walking sock with extra compressive support to reduce the risk of hurting your ankles when hiking on rough terrain. Medium thickness padding makes them ideal for year-round walking, hiking and rambling. Features include: Calf-length cuff, ideal for walking boots. Compression zones to increase ankle stability and reduce the risk of sprains. Anatomically positioned padding. Correctly shaped for right and left foot. Longitudinal channels for better air circulation and additional stretch when feet expand. Merino wool-mix for thermoregulation, moisture management and odour resistance. Materials: 39% Polypropylene, 28% Wool, 26% Polyamide, 7% Elastane. EU Size UK size 39-41 5½-7½ 42-43 8-9 44-45 9½-10½ 46-48 11-12½ If in doubt, go for the smaller size - a snugger fit means less chance of blisters.