Enjoy the cool, dry cushioning of New Balance’s moisture-wicking CoolMax footie. A reinforced heel and toe add strength, while the tight fabric provides arch support and stability. Invisible comfort toe seam. 70% CoolMax polyester/29% nylon/1% Lycra spandex. USA. S (Fits sizes 1 to 5-1/2) M (Fits sizes 6 to 10-1/2) L (Fits sizes 10-1/2 to 12-1/2) XL (Fits sizes 13 to 16)