High unisex thermal socks Xcelcius Classic ribbed design, quality material and knee length. These are the Xcelcius Thermo Knee unisex thermal socks, which will come in handy during active sports, but will also come in handy for leisure wear during the cold days of the winter season, when they will offer pleasant comfort. VILOFT® is a 100% natural high-end fiber that gives special properties and functions to textiles. A special fiber whose own technical properties and characteristics create fabrics that insulate the cold and retain heat. Material: 40% viloft, 40% polyester, 20% nylon