Mizuno Wave Creation 13 Womens Running Shoes US7 Synthetic/Mesh Synthetic and mesh upper. Dynamotion Fit: Reduces lateral stress for optimal fit. SmoothRide: Engineered approach to minimize the rapid acceleration and deceleration of the foot during transition. AP +: Increased rebound and a "bouncier" feeling, extending the cushion durability, while maintaining the light weight performance. Rubber sole.