The light and propulsive Pebax foam that carried Eulid Kipchoge to his 1:59:40 marathon is the same material you’ll find underfoot in the Nike Vomero 17. The ZoomX layer sits on top of a firmer, compression-molded, EVA-based Cushlon foam. This combination feels like a ridiculously soft pillow for the first few steps—especially with the absence of the ZoomAir unit that was in the forefoot of the Vomero 16. However, we found that once we settled into our strides, the latest Vomero felt increasingly responsive, and we just wanted to keep running.