Lighter and smoother every step of the way: With a softer, lighter PWRRUN formula and more midsole beveling, you get a thicker stack of cushioning and an incredibly smooth ride from heel to toe. Support that lets you fly: HOLLOW-TECH gives you the underfoot support you need, but in a lightweight and minimalistic way. Fits just right: By carving out the midsole and creating a deeper footbed, you sit into the shoe, instead of on top of it, for an incredibly supportive fit. Lighter Footprint: This style is vegan and contains recycled upper materials.