If you thought Merino wool&&';;s benefits-including comfort, breathability, and odor resistance-were great, you&&';;re gonna love what else this sock brings. With our Run Zero Cushion Ankle Socks, you also get Shred Shield(TM) technology to reduce wear from toes, mesh zones for enhanced breathability, a Virtually Seamless(TM) toe for enhanced comfort, and Indestructawool(TM) technology for extended durability. When you&&';;re ready to put in mile after mile of training runs, this sock will bring the comfort and durability goods. Features Sock Height: Ankle Sock Cushion: Zero Cushion Indestructawool(TM) technology with extended durability zones 4 Degree(TM) elite fit system for a dialed-in, performance-oriented fit Mesh zones for added breathability Shred Shield(TM) technology reduces wear from toes Virtually Seamless(TM) toe for enhanced comfort Overall 3.25" height Made in the USA of Imported Yarn: 46% Merino Wool 26% Nylon 25% Recycled Nylon 3% Elastane *Specific percentage of Recycled Nylon will vary as we transition to 100% Recycled Nylon in future seasons.