Size Chart From spring marathon training to fall trail runs, these socks will help you stay cool, dry and focused on your run, not on your feet. The crew height protects against road and trail debris; Indestructawool(TM) technology provides ultimate durability. Non-cushioned. Features: - 4 Degree(TM) Elite Fit System for a dialed, performance-oriented fit with flex zone at ankle joint - Indestructawool(TM) technology features a patent-pending construction method for exceptional durability and comfort - Mesh ventilation zones provide optimum moisture management and maximum breathability - Minimal cushioning for maximum performance in close-fitting shoes - Sock Height: Crew - 8.5" overall height - Virtually Seamless(TM) toe for enhanced comfort - Made in USA of Imported Yarn: 46% Merino Wool, 49% Nylon, 5% Elastane - Last Chance: Discontinued Style - Only available to ship within the USA