DescriptionWith all of the features that the PhD® Run Ultra Light Micro offers, your newest technology may be in your sock drawer. Indestructawool™ technology provides you with enhanced durability, while a 4 Degree™ elite fit system makes for a performance oriented fit. And Shred Shield™ technology reduces wear and tear from your toes. It's breathable, comfortable, and built to help take you farther.Benefits4 Degree™ Elite Fit SystemFor a dialed, performance-oriented fit with flex zone at ankle jointIndestructawool™ technology features a patent-pending construction method for exceptional durability and comfortMade In The USAPhD®Built for Performance in the Highest DegreeShred Shield helps reduce wear from toesUltra Light CushionThe absolute minimum between you and your shoes.Virtually Seamless™ ToeSmoothed out toe seams for ultimate in-shoe fit and comfortFeaturesSock Height: MicroIndestructawool™ technology for enhanced durability4 Degree™ elite fit system for a dialed, performance-oriented fitShred Shield™ technology reduces wear from toesBody-mapped mesh zones for added breathabilityVirtually Seamless™ toe for enhanced comfortAchilles tab designed to prevent sock from slipping down into footwearMade in USA of Imported Yarns: 45% Merino Wool, 50% Nylon, 5% ElastaneStyle: SW001405 CareMachine Wash Warm, Inside OutDo Not BleachTumble Dry LowDo Not IronDo Not Dry Clean