Mizuno Women's Wave Rider 14 Running Shoe 100% Synthetic Rubber sole Mizuno Wave technology combines cushioning and stability, two distinctly different elements that are both inherently necessary in great running shoes Dynamotion Fit design technology relieves the stress the foot naturally places on footwear, eliminating distortion for the perfect fit Mizuno Intercool is a full-length midsole ventilation system that reduces heat and humidity build-up inside the shoe Gender Engineering philosophy maximizes performance by tailoring footwear to the separate needs of men and women SmoothRide engineering approach minimizes the rapid acceleration and deceleration of the foot during transition, creating the smoothest ride possible