We use fine-combed cotton, which is stronger and softer to your skin than regular cotton. For durability and stretch, we mix it with high-quality nylon instead of cheaper and weaker polyester. Features: *95% Polyester, 5% Spandex *Fits shoe sizes 7-12 (sock size 10-13) *Great choice for gift giving on Christmas, birthdays Thanksgiving, etc *Allow you to be colorful, young, and fun underneath the dull grey suit you are forced to wear to your adult job. *Machine wash with like colors. Product Information Size: Fits shoe size 7-12 (sock size 10-13) Colors: Colorful Patterned Assorted