Stay Warm in Cold Days: Unigear kids ski socks are mostly blend of acrylic and merino wool to enhance warmth. Made of Elastane, the ski socks can wrap around the kids?? calf and feet snugly to maintain the heat in and cold out. Let the kids enjoy the outdoor activities in winter! Breathable to Keep Feet Dry: The merino wool provides the moisture-wicking properties to keep the kids?? feet cool and dry. There are 2 mesh ventilation areas on legs and feet to ensure a good breathability, which offers thermal and moisture regulation to feet. Comfortable and Cushioning to Protect Kids?? Feet: Unigear winter socks for boys and girls add the padded wool cushions in heel and forefoot to provide extra cushioning in winter sports, enhancing the wear resistance. The seamless design on toes offers great comfort. Ideal for skiing, snowboarding, biking and cold weather. Snug Fit without slipping off: The elastic cuff with high stretch will prevent the socks from sliding down to the ankles. Special knitting design on heels helps to fix the socks and ensure the comfort of feet. The elastic arch support offer more protection for kids when sporting. After-sales Service: Please read the size chart before purchase. If you meet any problems of Unigear ski socks, please contact us at any time.We will offer you a solution as soon as possible.