The Mizuno Wave Inspire 9 running shoe features a winning blend of cushioning, smooth ride, and moderate stability. Developed for medium-arched, flexible foot types. Highly ventilated AIR Mesh� upper provides breathability and comfort. Dynamotion Fit� creates an area of �give� in the heel collar/cradle. Gender Engineering creates running shoes that more closely fit the different running styles of the male and female runner, in return maximizing performance. AP lightweight, high rebound midsole gives greater momentum at take-off. Mizuno Intercool� full-length ventilation system. SmoothRide� engineered Composite Double-Fan Wave� adds a great blend of support and cushioning in a package that transitions like no other. VS-1� in the heel to help prevent overpronation. X-10� in heel adds durability. Solid rubber and blown rubber in forefoot offer durability and flexibility. Wt. 10.1 oz.