Smartwool PhD Slopestyle Medium Switch 1980 Socks - Past Season 63% Merino Wool, 35% Nylon, 2% Elastane Knit in USAof Imported Yarn Designed to celebrate the original socks with style. Flat knit durable toe seam 14" overall height Sock Height: Over the Calf Knit in USAof Imported Yarn: 63% Merino Wool, 35% Nylon, 2% Elastane Style: SW0SW343