SmartWool Women's PhD Ski Ultra Light Socks 55% Merino Wool, 42% Nylon, 3% Elastane Made in USA Virtually Seamless toe 13" overall height - Sock Height: Over the Calf 200 needle construction provides highest knit density while maintaining ultra light weight Style:SW015025 Care: Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.