SmartWool PhD Slopestyle Medium Wenke Socks - Past Season 63% Merino Wool, 35% Nylon, 2% Elastane Knit in USA Street art-inspired design meets Smartwool PhD performance. Virtually Seamless toe Sock Height: Over the Calf - 14" overall height Style: SW015040 Care: Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.