We've put all of our smarts into these new and improved Women's Run Zero Cushion Low Ankle Socks. You won't break your stride, thanks to our Indestructawool™ technology designed for added durability and an Achilles tab designed to help prevent sock slippage. And by adding our brand-new Shred Shield™ technology to one of our best running socks, the wear and tear from toes is reduced, helping you push toward your finish line and achieve higher mileage. Features Sock Height: Low Ankle Indestructawool™ technology with extended durability zones 4 Degree™ elite fit system for a dialed-in, performance-oriented fit Mesh zones for added breathability Shred Shield™ technology reduces wear from toes Virtually Seamless™ toe for enhanced comfort Women's specific fit Achilles tab prevents sock from slipping into footwear Made in the USA of Imported Yarn: 47% Merino Wool 31% Nylon 19% Recycled Nylon 3% Elastane *Specific percentage of Recycled Nylon will vary as we transition to 100% Recycled Nylon in future seasons