Smartwool Men's PhD Outdoor Ultra Light Micro Socks 48% Merino Wool, 47% Nylon, 5% Elastane Knit in USA 2" high 4" wide Virtually Seamless toe 1.5" overall height Sock Height: Micro Style: SW001061 Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.