Mizuno Running - Wave Rider 8 (White/Lemon/Navy) - Women's: Created for the runner who has a neutral gait cycle and demands the best blend of cushioning and support that gives the ultimate heel to toe transition. 24mm/12mm (heel to forefoot ratio). SmoothRide(tm) Engineered Composite Parallel Wave(tm) allows for an optimal blend of cushioning and suport for the neutral runner looking for a great transition from heel to toe. Starting at the heel and going forward, the Composite Wave(tm) is made of VS-1(tm) for initial impact cushioning, Pebax to uniformly absorb shock and cushion the foot, and polyester fiber inserts to maximize the cushioning properties of Wave Technology(tm). The redesigned Parallel Wave(tm) configuration provides a smooth transition from heel to toe by reducing shock vibration inherent to running. AP midsole for lightweight, responsive cushioning. X-10(tm) in the heel for durability. Solid rubber in the forefoot for durability. SmoothRide engineered flexsole pattern for flexibility. Shoe weighs 9.0 oz.