Easy Care: Machine Wash, Tumble Dry; Please Reference the for More Details. Arch Support: Special stretch knit relieves foot fatigue by compressing the arch, adding much-needed protection so he can achieve his best. Moisture Control: He’ll appreciate cool dry feet and the ability to stay on top of his game when he wears our sweat reducing socks. Cushioned Comfort: Foot cramps and soreness are significantly reduced during sports or daily activity because of the additional padding in areas of high impact. SIZE SCALE: Toddler, Small, Shoe Size: 4-8. Little Kid, Medium, Shoe Size: 8.5-2, Big Kid, Large, Shoe Size: 4-10. Machine Wash. Imported. 95% Polyester, 5% Spandex.