X-wrap ankle socks with arch support. 68% Polyester/28% Nylon/3% Spandex/1% Elastic. Sock Size: 9-11: Boy's Shoe Size: 3.9, Women's Shoe Size 6-9. Sock Size: 10-13: Men's Shoe Size: 6-12, Women's Shoe Size 10-12. Made in USA.