Anatomically shaped feet and optimum sizeAdditional shifting pad on the left footErgonomic padded areasMaterial: 50% polypropylene, 20% acrylic, 15% new wool, 15% polyamideSize Guide:XS / 37-38, S / 39-41, M / 42-43, L / 44-45, XL / 46-48Sock designed for use on motorcycles