Mizuno Wave Sky 4 Waveknit Women's Arctic Ice Ready to reach new heights? Step into the soft Mizuno Wave Sky Waveknit 4 and chase after your goals! This version introduces Mizuno Enerzy Foam to provide a plush feel with every step. Watch the miles breeze by in the sleek and comfortable WAVEKNIT™ upper. When it's time to cruise to smooth miles, lace up the Mizuno Wave Sky Waveknit 4! What's New? Mizuno Enerzy Foam is softer and more responsive than previous midsoles, providing smoother transitions with every step. Who's it for? Neutral runners looking for a flexible and comfortable shoe with responsive cushioning. Shoe Technology Upper: WAVEKNIT™ creates a comfortable fit that allows for natural movement on the run. Midsole: Mizuno Enerzy Foam delivers a soft and responsive feel with every step. Mizuno Wave® plate provides both cushioning and stability. XPOP PU delivers high energy return and durability. U4icX Strobel lining and podular U4icX midsole add cushioning for comfort. Outsole: X10™ solid rubber outsole at the heel and midfoot increase durability and in the forefoot to allow for smooth transitions.