With 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.
Medium: US Men's 6-8.5, Large: US Men's 9-11.5, X-Large: US Men's 12-14.5