The Mach X 2 is HOKAs best shoe for speedwork yet. It features a design that is inspired by the Cielo X1 race shoe to offer you a great running experience. They feature an extra resilient PEBA-topped midsole with an increased rocker profile which offers an aggressive toe-off, combined with an extended Pebax® plate design for enhanced support and propulsion. With an extra-breathable and supportive woven upper and a sleeker collar, the Mach X 2 keeps things light, cool, and fast for next-level efforts. Pebax® plate. Breathable upper. Lightweight design.