Smartwool Women's PhD Ski Light Pattern Socks 50% Merino Wool, 48% Nylon, 2% Elastane Knit in USA 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.