What do you get when you cross the comfort and support of the Mach with a propulsive Pebax® plate? You’re looking at it. A pace-pushing shoe built with high-rebound cushioning; the new Mach X is supercharged with a layer of PEBA foam that’s 34% more resilient than the Carbon X 3 foam. Softer and snappier than ever before, this adaptable shoe is comfortable enough for endurance efforts and responds equally well to pace increases., USED ​​IN EXCELLENT CONDITION, WASHED AND READY TO USE, THE LETTERS ON THE SIDES HAVE DETACHED.