Men’s shoe size 7 to 12. Machine wash cold. Tumble dry medium heat. Do not bleach. By blue Q. 54% nylon 44% combed cotton 2% spandex. 1% of the sale of these socks supports the humanitarian work of Doctors Without Borders. Who doesn’t love a FREE GIFT? ***********We appreciate you and strive to earn your repeat business. Every purchase includes a complimentary small gift as our way of saying thank you! Bundle purchases are recognized with an appropriately higher value thank you gift.