The Carolina Ultimate Merino Wool Blend Boot Sock (2 Pack) - Youth is a medium-weight sock for in-boot comfort. Kids deserve the best and the acrylic, merino wool, nylon, and spandex blend delivers next-to-skin coziness during every hike. The tall height provides cushion from mid-calf to toe inside a range of boot heights. They wick moisture, dry fast, and remain durable as they learn the ins and outs of camping, hiking, and backpacking.