Sock Height: Over-the-Calf Sock Cushion: Zero Cushion 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 Smartwool Ski Day Zero Cushion Merino Socks Mens