With supportive cushioning built for a smooth run the Nike InfinityRN 4 is a brand new take on a familiar favourite. It's made from our all-new 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 its carbon footprint in a pair of midsoles by at least 43 compared with Nike React foam.) This version has GORE TEX fabric to help you stay dry for your miles. It's the kind of shoe that supports every step in style. The carbon footprint of ReactX is based on a cradle-to-gate assessment reviewed by PRé Sustainability B.V. and Intertek China. Other midsole components such as airbags, plates or other foam formulations were not considered.