Mizuno Running - Wave Inspire (White/Red/Navy) - Men's: Developed for the runner who desires the best blend of support and cushioning in a package that respects the needs of the medium arched, flexible foot-type and gives the ultimate heel to toe transition. 24mm/12mm (heel to forefoot ratio). SmoothRide Engineered Composite Double Fan Wave provides a great blend of support and cushioning for the runner looking for a great transition from heel to toe with a foot-type that is medium arched and moderately flexible. The Composite Double Fan Wave is made of VS-1 in the heel to give specific cushioning at heel strike and Pebax and graphite to prevent overpronation medially in the heel to midfoot phase of the gait cycle. The redesigned Double Fan Wave configuration provides a smooth transition from heel to toe by reducing the shock vibration inherent to running. AP midsole for lightweight, responsive cushioning. X-10 in the heel for durability. Solid rubber and blown rubber in the forefoot for durability and flexibility. SmoothRide, engineered flexsole pattern for flexibility. Shoe weighs 11.3oz.