When it comes to Smartwool’s most comfortable running socks, they pull out all the stops to continuously make improvements to their products. With brand-new Shred Shield™ technology to help improve wear in the toe box, our PhD® Run Ultra Light Micro socks feature the 4 Degree™ elite fit system and the  Indestructawool™ technology for a dialed-in fit and improved durability.   

*BUY THREE GET ONE FREE * USE CODE AT CHECKOUT:  SOCKB3G1  

*REGULAR PRICE SOCKS ONLY