SmartWool Men's PhD Outdoor Medium Crew 63% Merino Wool, 35% Nylon, 2% Elastane Knit in USA Virtually Seamless toe 8.5" overall height Sock Height: Crew Style:SW001071 Care: Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.