The Mizuno Wave Ascend 4 running shoe will raise your trail running workout to new heights. AIRmesh™ upper with Dynamotion Fit provides the utmost in breathability and comfort. AP midsole is made of lightweight, responsive, yet durable cushioning copolymer. SmoothRide™ engineered Composite Double Fan-Shaped Wave™ provides a great blend of support and cushioning in a low profile model built to handle the rigors of trail running. X-10™ durable carbon rubber outsole allows for longer wear in high impact areas and supplements traction at heel strike. Wt. 11.4 oz.