Soccer Team Socks by GekoSox •Sturdy but soft and comfortable feel. •Flexion zone in knee area that extended top of the sock for an extra layer of protection. •Calf Rear panel support-knit enhances circulation. •Compression support. •Reinforced Heel and Toe for comfort and durability. •Elastic arch support. •Knit Polyester and Spandex for a perfect fit. •Three sizes: Small (Kids), Medium (Youth), and Large (Adult).