The redesigned Mizuno Wave Rider 21 Running Shoe features Mizuno's Wave technology for softer cushioning, and an enhanced responsive feel. The DynamotionFit features a breakthrough in Dual Zone engineered mesh for breathability, movement, and hold when it is needed while running. Runner Type: Neutral DynamotionFit Dual Zone engineered mesh for breathability and support. Cloudwave technology for a softer, more responsive ride. Anatomical sockliner for an improved fit and feel. U4icX lining for ad