3x1 rib welt, light cushion shin and foot, flat knit toe seam * SmartWool inside for moisture, temperature, and odor control. Flat knit toe seam. Over the calf height, light cushion. * 70% merino wool, 28% nylon, 2% elastane, washing machine and dryer friendly! * Kid"s Size XS=shoe size 6-8.5, S-shoe size 9-11.5, M=shoe size 12-2.5, L=shoe size 3-8