InfinityRN 4 Width:Regular Fresh Foam X midsole delivers

Fresh Foam X midsole delivers our most cushioned Fresh Foam experience for incredible comfort

SHIELD: A toric shield of Plutonite® in a rimless design for a fashion-forward style

FF BLAST™ PLUS ECO technology

There's even gusseted side pockets that help keep your keys or card from falling out

You're as fragile as a coral reef

InfinityRN 4 Width:Regular Fresh Foam X midsole deliversWith supportive cushioning built for a smooth run, the Nike InfinityRN 4 is a brand new take on a familiar favorite. It's made from our all new Nike ReactX foam, which gives you 13% more energy return compared with 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 to Nike React foam.*) We coupled the ReactX foam with Nike Running's best fitting