The "Nikki" knee sock is made of sturdy Welltex® material and features a stretch terry sole under the footbed. Therefore, these socks are ideal for horseback riding during the colder winter months or for active outdoor sports. The "Nikki" model is an ideal training sock for all athletes and sports enthusiasts. This model is also characterized by its compressive effect. Available in black in sizes S (35-37), M (38-39), L (40-42), and XL (43-45). Material: 88% Polyester, 7% Elastane, and 5% nylon. Washing instructions: Wash at a maximum of 40 degrees on a moderate cycle. Do not use bleach. Dry at low temperature, do not iron, do not dry clean. Do not use fabric softener.