Smartwool Women's PhD Ski Light Elite Pattern Socks 56% Merino Wool, 41% Nylon, 3% Elastane Made in USA with Imported Yarn Indestructawool technology 4 Degree elite fit system Body mapped mesh zones Virtually Seamless toe - Women's specific fit Care: Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.