Features of the Smartwool Men's Ski Full Cushion Alpine Edge Sock Indestructawool Technology for enhanced durability 4 Degree elite Fit system for a dialed-in, Performance-oriented Fit Shred shield Technology reduces wear from toes Wider welt for secure Fit and comfort Body-mapped mesh zones for added breathability Fabric Details 61% Merino wool, 10% Nylon, 27% Recycled nylon, 2% Elastane