The redesigned Mizuno Wave Rider 20 running shoe is focused on providing a softer and more responsive feel for neutral runners. A Triple Zone engineered mesh allows for enhanced breathability without sacrificing structure and support around the midfoot. Runners get a light and fast shoe that will take them through mile after mile. Upper: Dynamotion Fit upper with Triple Zone engineered mesh for breathability and support around the forefoot. Padded tongue and softer heel collar enhance comfort. Lace-up front offers an adjustable fit. Midsole: U4ic compound in the topsole U4icX foam in the heel and lasting board provides high comfort and performance while being extremely lightweight. The updated Neutral Wave plate provides a cushioned, responsive feel. Removable insole. Outsole: Durable rubber that allows for longer wear in high impact areas and provides more traction at the heel strike.