Inspired by the Rocket X and Carbon X 2, the Mach 4 is designed for logging training miles. It blends a soft, cushioned foam on top of a rubberized foam that is positioned directly underneath. This provides a soft and forgiving underfoot feeling yet amazing energy return at faster paces.
The upper of the Mach 4 is made using heat pressed TPU embroidered yarns. This not only improves the fit of the shoe, but is a more environmentally friendly way of producing the upper. The Mach 4 is designed for runners who are performance orientated and want a well cushioned, yet highly responsive feel that can cope with a wide range of paces in training.