Size Chart For cyclists that want maximum comfort with minimal coverage, this sock might just be your new secret weapon. Indestructawool(TM) technology provides ultimate durability, the 4 Degree(TM) elite fit system provides a dialed fit and the ultra light cushioning sits perfectly in close-fitting cycling shoes. Merino helps move moisture and regulate temperature to keep your feet comfortable even after hours in the saddle. 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 - Non-cushioned for maximum performance in close-fitting cycling shoes - Sock Height: Micro - 1.75" overall height - Achilles tab - Virtually Seamless(TM) toe for enhanced comfort - Made in the USA of Imported Yarns: 46% Merino Wool, 50% Nylon, 4% Elastane - Last Chance: Discontinued Style - Only available to ship within the USA