With supportive cushioning built for a smooth run, the Nike InfinityRN 4 is a brand-new take on a familiar favourite. It's made with our Nike ReactX foam, which gives you 13% more energy return compared to Nike React foam to help you stay fresh and bouncy. (What's more? Nike ReactX reduces the carbon footprint of the midsole by at least 43% compared with Nike React foam, so it helps support the planet, too). It's the kind of shoe that can grant you that priceless peace of mind to go faster and further, thanks to an intuitive design that supports every stride.