Say bye to boring, run-of-the-mill running socks. Smartwool has brought its proprietary 360-degree printing technology to these trail-crushing, race-day-worthy run socks - giving you the performance you expect, with a fun little twist. These Women's PhD(R) Run Ultra Light Print Micro socks feature Indestructawool technology for added durability, Shred Shield technology to reduce wear from toes, and body-mapped mesh zones for added breathability. 44% nylon52% wool5% elastane. PhD(R): Built for Performance in the Highest Degree. 4 Degree Elite Fit System: Uses two elastics for greater stretch and recovery to keep the sock in place. Indestructawool technology features a patent-pending construction method for exceptional durability and comfort. Multi-sport design. Ultra Light cushioning. Body-mapped mesh ventilation zones. Virtually Seamless toe. Shred Shield technology, Smartwool's newest technology, reinforces the toe cap with minimal cushioning. The result reduces excess friction from the toe and around the toenails and increases durability three times. Achilles Tab prevents sock from slipping down into shoe. Imported.