The Kilpi FUSIO-U socks offer climatic comfort thanks to the elastane knitted fabric and synthetic fibers, which create air chambers for maximum breathability and at the same time increase the durability of the sock. The stretchy, wide hem around the ankle does not press and does not impede blood circulation. The airy, structured zone in the instep area eliminates sweating and fixes the position of the sock. The height of the socks above the ankles. Convenient pack of 3 pieces. Multiple color options available. Sock sizes: size 27 - 30: suitable for a foot length of 17 - 20 cm, size 31 - 34: suitable for a foot length of 21 - 23 cm, size 35 - 38: suitable for a foot length of 23.5 - 25 cm, size 39 - 42: suitable for a foot length of 26 - 28 cm, Size 43 - 46: Suitable for a foot length of 29 - 31 cm.Material composition: 75% polyester, 15% polyamide, 10% elastane