3x1 rib leg and elasticized arch brace, flat knit toe seam and side panel. * medium cushioned foot, crew height rises 6-8 inches above ankle * 71% wool, 28% nylon, 1% spandex, machine wash, tumble dry * Kid"s Size XS=shoe size 6-8.5, S-shoe size 9-11.5, M=shoe size 12-2.5, L=shoe size 3-25 * Washer and Dryer friendly