The ultimate multi-purpose sock for boys on the goMedium-weight design is perfect for year-round wearCushioned sole and knit-in heel protection3x1 knit soft top for ankle comfortY-heel fitLow-rider height comes to just below the ankle80% cotton, 15% polyester, 3% nylon and 2% spandex Two pairs per packageSize S fits toddler shoe size 9 to 11Size M fits toddler shoe size 12 to 13-1/2 and youth size 1 to 4-1/2Size L fits youth shoe size 5 to 8-1/2