The optimum running sock. Sports compression enhances performance both during and after training, due to increased blood circulation that also increases oxygen supply. Reinforced section on the shin protects from briers and thorns when you run in the woods. Mesh panel on the calf for ventilation. Anatomically correct design for left and right feet gives an optimum fit and minimises the risk of blisters. Stabilising section around the ankle. 49% Polyamide - Nylon / 33% Wool (Merino) / 10% Silk / 7% Elastane / 1% Silicone