Product Material: Cotton 60%+Nylon 37%+Spandex 3% 35-39M: 20*35cm (sole * upper tube) 40-45L: 23*40cm (foot sole * upper tube) Color: black, dark blue, green Package content: 1 pair of ski warm socks 1. WOOL - The natural wool is extracted from sheep. These thermal socks will keep your feet dry, warm and comfortable every day. Up to 67% wool,our long cushioned ski socks with terry on sole and shin are thermal and warm enough in cold winter,knee high length helps keeping your feet always at optimal level warmth. 2.ENHANCED WARMTH - These blend socks are temperature controlled, as the targeted ventilation mesh lanes and zones optimize the airflow and wicks away sweat and let it evaporate. 3.Reinforced Toe Heel-Terry reinforced toe and heel provide additional cushion for extra softness and warmth,reducing foot friction and relieve foot fatigue, effectively protect your feet from painful blisters . 4.LIGHTWEIGHT SKI SOCKS - The ski sock is designed with special yarns to provide superior warmth and help keep body heat in the sock. The ski socks are a medium thickness to ensure a perfect fit with your ski boot. 5.Elastic Ribbed Cuff - Over the calf length for protection and added comfort.Knit Padding Front Back Unique Mesh upper that absorbs and wicks moisture