Taking over for the Mizuno Wave Sayonara, the new Mizuno Wave Shadow running shoe is designed for those who want a speedy ride. This lightweight neutral shoe offers runners a springy feel from Mizunos cloudwave technology infused in the midfoot. Runners will also enjoy the cushioning from the U4icX in the heel. Comfort and speed are blended together for a fast, yet comfortable feel throughout the run. Upper: Mizuno DynamotionFit includes a 3 panel upper construction with a seamless midfoot and minimal forefoot for a disappearing fit. New anatomical sockliner provides a better fit and feel. Flat laces reduce irritation. Midsole: Cloudwave technology for cushioned comfort and response, while being extremely lightweight. U4icX strobel lining for added cushioning. Outsole: X10 solid rubber outsole at the heel and midfoot for durability and forefoot zig zag pattern for snappy toe off.