The Mizuno Wave Elixir 4 running shoe helps minimize the rapid acceleration and deceleration of the foot during transition, creating the smoothest ride possible. AIRmesh™ upper with Dynamotion Fit technology provides the utmost in breathability and comfort. SmoothRide™ engineered Composite Double Fan-Shaped Wave™ offers the perfect blend of support and cushioning in a low-profile, lightweight package. AP midsole is made of lightweight, responsive, yet durable cushioning copolymer. X10™ durable carbon rubber allows for longer wear in high-impact areas and supplements traction at heel strike. SmoothRide™ solid rubber/blown rubber forefoot outsole offers cushioning, flexibility and durability. Wt. 9.4 oz.