A full-length semi-rigid nylon plate between two layers of responsive PWRRUN PB foam, giving you a perfect balance of propulsion and cushioning for every stride. New lightweight engineered mesh for an even more comfortable fit, perfect for fast-paced runs and daily wear. Reconfigured outsole with expanded coverage in the heel for greater durability during your quickest strides. Full-length groove enhances your gait cycle, giving you a smoother transition from foot strike to push-off.