Indestructawool™ technology with extended durability zones. 4 Degree™ elite fit system for a dialed-in, performance-oriented fit. Additional body-mapped mesh zones for added breathability. Virtually Seamless™ toe for enhanced comfort. Comfort welt with 'stay put' fit. CONTENT: 56% Merino Wool 11% Nylon 31% Recycled Nylon 2% Elastane. HEIGHT: Ankle. CUSHIONING: Light Cushion. Height 3.25".