Smartwool PhD Ski Medium Socks - Men's: Don't let the cold stop you from taking one last run: the PhDA(R) Ski medium delivers maximum warmth and breathability when the going gets cold. Patent-pending Indestructawool(TM) technology provides ultimate durability to make sure your socks are ready to go, run after run. Made with our 4DegreeA(R) elite fit system for a sock that doesn't bunch, slip, or bind. Benefits PhDA(R) Built for Performance in the Highest Degree 4 Degree(TM) Elite Fit System For a dialed, performance-oriented fit with flex zone at ankle joint Indestructawool(TM) Indestructawool(TM) technology features a patent-pending construction method for exceptional durability and comfort Medium Cushion Medium cushioned shin and foot for impact absorption and warmth Features Sock Height: Over the Calf Body-mapped mesh zones for added breathability Virtually Seamless(TM) toe for enhanced comfort 14" overall height Made in USA of Imported Yarn: 62% Merino Wool, 36% Nylon, 2% Elastane Style: SW015032