Natuworld Pack of 4 Children Girls Boys Toddlers Cotton Thicken Knee Long Soccer Socks Team Socks for Kids Material: 100% Cotten. Sizes for 2-3 years old kids. Elastic rubber band design, good elasticity for improved fit. Bottom are Thick towel design, Anti-Slip Suck sweat. Breathable, Comfortable Elastic and Thin Over Knee.