SUPER WARM THICK SOCKS! 80% Thicken combed cotton,15% Polyester,5% spandex,the thicken winter socks for boys are great cold weather gear. FLEXIBILITY & COMFORT! Combed cotton thick socks with fleece lined inside,not only thick,its elastic features will let them stretch to your movements. CREW SOCKS LENGTH! These are seamless socks feauring crew socks length,protect the ancles and calves well. MUST-BUY ITEM! This great value pack of 5 thick socks for kids are in assorted unique colors.Cozy for wearing around the house,and great for outdoor activities and sports in extreme weather conditions,like hiking, walking, camping. NON-FADE COLORS GUARANTEE! Machine wash available! Recommend hand wash to maintain the durability of fleece socks.