Features of the Smartwool Men's Ski Full Cushion Camo OTC 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 66% Merino wool, 10% Nylon, 22% Recycled nylon, 2% Elastane