Lighter PWRRUN formula and more midsole beveling, you get a thicker stack of cushioning and an incredibly smooth ride from heel to toe. HOLLOW-TECH gives you the underfoot support you need, but in a lightweight and minimalistic way. 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. This style is vegan and contains recycled upper materials.