SmartWool PhD Run Light Elite Mini Socks 51% Merino Wool, 46% Nylon, 3% Elastane Knit in USA 200 needle construction provides high-density cushioning while maintaining light weight Virtually seamless toe 3.75" overall height - Sock Height: Mini Style:SW0SW170 Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.