The Smartwool Men's PhD Outdoor Ultra Light Mini Sock. Made with Indestructawool(TM) technology for ultimate durability and the 4 Degree(R) elite fit system to keep the sock in place. The mini height offers the perfect balance of low profile and protection from debris. Features: Virtually Seamless(TM) toe 3.75" overall height Sock Height: Mini Made in USA of Imported Yarn: 48% Merino Wool, 47% Nylon, 5% Elastane