K. Bell Socks Men's Zipper Stripe,10-13,Brown Triangle Squares 2% spandex 60% Cotton, 38% Polyester, 2% Spandex Men Sock Size 10 - 13, Shoe Size 6.5 - 12 Machine wash cold gentle cycle/Tumble dry low Made in Korea Satisfaction Guaranteed (Return used or unused within 30-days for a full refund excluding original shipping charge)