Features of Smartwool Men's Performance Snow Targeted Cushion Astronaut Over The Calf Sock Indestructawool Technology for enhanced durability 4 Degree elite Fit system for a dialled-in, Performance-oriented Fit Body-mapped mesh zones for added breathability Wider welt for secure Fit and comfort Virtually Seamless toe for enhanced comfort 14in. overall height Fabric Details 63% Merino Wool 35% Nylon 2% Elastane