SmartWool Men's PhD Ski Light Socks 56% Merino Wool, 42% Nylon, 2% Elastane Knit in USA 200 needle construction provides high-density, low-profile cushioning Virtually Seamless toe Sock Height: Over the Calf 14" overall height - Style: SW015031 Care: Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.