When it comes to running socks, Smartwool pulled out all the stops to keep improving its products. With brand-new Shred Shield™ technology to help improve wear in the toe box, these PhD® Run Ultra Light Micro socks feature the 4 Degree™ elite fit system and Indestructawool™ technology for a dialed-in fit and improved durability.

• 49% merino wool/47% nylon/4% elastane
• PhD®: 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
• ReliaWool Technology, added to high-impact areas, provides longer-lasting protection to keep feet comfortable.
• Made in USA of Imported Yarns