The Mizuno Wave Inspire 4 running shoe was developed for the runner who desires the best blend of support and cushioning that respects the needs of medium-arched, flexible foot types. Highly ventilated AIRmesh™ upper provides breathability and comfort. AP midsole provides lightweight, responsive cushioning. Mizuno Intercool® midsole ventilation system. SmoothRide™ engineered Composite Double Fan Wave™ adds 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. 11.1 oz.