The HOKA ONE ONE Mach 4 is a lightweight, versatile running shoe with a generous layer of cushioning. Inspired by the Carbon X, the Mach 4 will meet the expectations of runners looking for a soft and responsive model for their long-distance races. If you've raced with the Mach 3, you'll notice what's new in this new version. The new foam developed by HOKA accentuates the flexibility and rebound effect of this shoe. In addition, its redesigned midsole ensures smoother transitions. Soft cushioning, ultra comfortable sensations Responsive foam provides an energetic stride Secure fit with a reshaped technical mesh upper Smooth transitions with every stride MIDSOLE PROFLY foam that provides cushioned landings and good propulsion. Flat, curved geometry consisting of a rocking midsole that accentuates the fluidity of the stride. OUTSOLE Rubberized foam for high energy return, a touch of extra cushioning and good grip. STEM Technical mesh providing good structure and improved midfoot support. Tongue with strategically placed perforations. Anatomical structure of the Achilles tendon to limit irritation.