The new Phantom 4, our neutral max cushioning model, offers an even smoother, more responsive, and comfortable stride. The new design of the upper, midsole, and outsole gives the shoe a fluid and dynamic look. We've increased the stack height by 2 mm, now reaching a platform of 35 on 30 mm for even more generous cushioning. Our ZipFoam™ foam is lighter, softer, and more responsive than ever. The Topo Athletic Phantom 4 is perfect for your daily outings, running, walking, or all-day use. You and the Phantom 4 make a perfect duo. Together, nothing can stop you.