Adult Boot Socks/Kneehighs HORSE PSYCHABRITE are NICE! Fiber content of sock is acrylic and stretch nylon, size is 9-11 (Adult Medium) fits women shoe size 6-10 . The design is knitted right into the sock, so hard to resist them. Perfect for "Best Sock Day" at work or to wear to the horse show, these are especially made to wear with tall english style boots. Show off your favorite sport in style!