Mizuno's iconic 9-spike technology for optimum traction. The outsole includes 3 zones to enhance Power, Propulsion, and Performance. Full length EVA midsole provides premium heel to toe cushioning. Mizuno Swift 8 also features Mizuno Wave technology to relieve the shock sent to your ankles and pressure while planting your foot, which in turn, enables you to maintain a highly stable base. The New double stacked insole improves step in comfort for a more cushioned experience.