Description We've put all of our smarts into these new and improved Women's PhD® Run Ultra Light Micro 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 our running socks, the wear and tear from toes is reduced, helping you push toward your finish line and achieve higher mileage. Features Indestructawool™ technology for enhanced durability 4 Degree™ elite fit system for a dialed, performance-oriented fit Shred Shield™ technology reduces wear from toes Body-mapped mesh zones for added breathability Virtually Seamless™ toe for enhanced comfort Achilles tab designed to prevent sock from slipping down into footwear Women's specific fit; narrower heel and slimmer fit 48% Merino Wool, 48% Nylon, 4% Elastane Style: SW001408 Benefits 4 Degree™ Elite Fit System For a dialed, performance-oriented fit with flex zone at ankle joint Indestructawool™ Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort Mesh Venting Mesh ventilation zones provide optimum moisture management and maximum breathability PhD® Built for Performance in the Highest Degree Shred Shield™ Shred Shield helps reduce wear from toes Ultra Light Cushion Minimal cushioning for maximum next-to-foot performance without added bulk Women's Specific Fit Women's specific fit; narrower heel and slimmer fit Care Machine wash warm, wash inside out. Do not bleach. Tumble dry low. Do not iron. Do not dry clean.