The Smartwool Light Hiker Dark Blue children's sock keeps your little one's feet nice and cozy and is ideal for their little adventures. The sock features itch- and stink-free, super-soft ZQ-Certified Merino wool and a flat-knit toe seam. The benefits include light cushioning ideal for varied trail and road terrain. The crew height sock also includes an elasticized arch brace for secure fit. It comprises of 58% merino wool, 39% nylon and 3% elastane.