Smartwool put all of their smarts into these new and improved 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 their brand-new Shred Shield™ technology to one of their best running socks, the wear and tear from toes is reduced, helping you push toward your finish line and achieve higher mileage.