64% Merino Wool 11% Nylon 23% Recycled Nylon 2% Elastane. Indestructawool™ technology for enhanced durability. 4 Degree™ elite fit system for a dialed-in, performance-oriented fit. Body-mapped mesh zones for added breathability. Wider welt for secure fit and comfort. Virtually Seamless™ toe for enhanced comfort. Women's specific fit: narrower heel and slimmer fit. 14" overall height. Over-the-Calf. Targeted Cushion.