You will feel like you're floating on air every time you run in the Mizuno Wave Sky 6. Mizuno used a two-layer midsole to create the Wave Sky’s soft and smooth ride. The top layer is softer and more responsive Enerzy Core foam, and the bottom layer is Mizuno’s Enezy foam that provides for a smooth, stable and resilient ride. Our testers loved the durability of the shoe and how it felt cushioned, yet firm in our Mizuno Wave Sky 6 review. The stretch woven upper with a gusseted tongue is both soft and secure for an adaptive fit that keeps your foot stable and positioned correctly. Plus, the eco-friendly upper is made with PET recycled materials, so you can feel good about wearing them. The Mizuno Wave Sky 6 is supremely smooth, soft and energetic to give you comfortable and cushioned runs.