Whether you're training for a marathon or just enjoying a casual run, the Nike Vomero 18 is the ideal all-round running shoe. Take on your running challenge with the Vomero 18. Midsole This shoe offers excellent cushioning thanks to a combination of Nike's ZoomX foam over the full length of the shoe and ReactX foam in the heel and forefoot. ZoomX provides 85% energy return, so you feel like you're being propelled while running. In combination with ReactX foam, this makes for a very responsive and comfortable running experience. A Zoom Air unit is built into the midsole of this shoe, which absorbs impact and then quickly bounces back, reducing the stress on muscles, joints and tendons. Zoom Air units allow you to run faster and jump higher because they transfer energy more efficiently. Upper Vomero 18's mesh upper keeps the shoe breathable and comfortable while running. Outsole With a rubber outsole, the shoe provides good grip and traction while running.