DARN TOUGH RUN 1/4 UL RUNNING COLOR:BLACK You and the Phantom 4

You and the Phantom 4 are the perfect match

Made to replace the removable liner in moderate to tight-fitting running and walking shoes

Fast-drying and breathable

Because traditional fueling gels and drinks use carbohydrates that break down too fast to tolerate

DARN TOUGH RUN 1/4 UL RUNNING COLOR:BLACK You and the Phantom 4Take on everything from single track training to jeep road crushers in the smooth and ultra lightweight fit of the redesigned running sock. Its added ankle coverage sports silky next to skin ribbing, with breathable flex zones in the forefoot and fatigue zapping arch support. Height: Quarter Weight: Ultra Lightweight Sock Size Shoe Size Men Unisex Men US Women US EU UK XS 2. 5 5 4. 5 7 35 37. 5 2. 5 4. 5 S 5. 5 7. 5 7. 5 9. 5 38 40. 5 5 7 M 8 9. 5 10