Fit & Design Mesh zones for added breathability Ribbed leg for styling and comfort Technology Indestructawool(TM) technology with extended durability zones 4 Degree(TM) elite fit system for a dialed-in, performance-oriented fit Shred Shield(TM) technology reduces wear from toes Virtually Seamless(TM) toe for enhanced comfort Additional Details 51% Merino wool 14% nylon 31% recycled nylon 4% elastane