SmartWool Women's PhD Ski Light Elite Socks 60% Merino Wool, 37% Nylon, 3% Elastane Knit in USA 200 needle construction provides high-density, low-profile cushioning Virtually Seamless toe Sock Height: Over the Calf - 13IN overall height Style: SW015026 Care: Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.