Merino,Nylon,Wool Made in USA Keep your ensemble on point with the classic, everyday style of this Smartwool? knee-high sock. Sold as a three-pair pack. Knee-high sock. Ribbed cuff. Supportive arch band. Virtually seamless toe closure for enhanced comfort. 66% merino wool, 32% nylon, 2% elastane. Machine wash cold. Tumble dry low. Made in the U.S.A. from imported fibers.