Andrea: The Nike InfinityRN 4 is a complete redesign of the Infinity Run line. It now features Nike's ReactX midsole foam, which Nike states provides 13% more energy return as compared to the React foam used in previous versions. Nike also states that ReactX has a 43% lower carbon footprint as compared to React foam.. Nike InfinityRN 4 review: The Nike InfinityRN 4 distinctively differentiates itself from its previous model. Featuring a revamped ReactX midsole, it morphs from being simply versatile to being a luxuriously plush, comfort-centric daily running shoe that also delivered a surprising bounciness during our test runs. Although it leans a bit towards the heavier spectrum and may not offer the best.
Nike Reactx Infinity Run 4 Men's Black/White Dark Grey This item is on sale. Price dropped from $160 to $112 $112 $160. 30% off . More Colors Available. Sale . QUICK ADD + Nike Reactx Infinity Run 4 Men's Light Armory Blue/Black Star This item is on sale. Price dropped from $160 to $109.99 $109.99 $160. 31% off .. ReactX Foam Midsole. A rocker-shaped platform of soft, supportive ReactX foam cushioning provides enhanced comfort. Plush Padding. We enhanced the sock-like feel with added foam around the collar and plush fabric on the tongue for a soft, inviting fit. Waffle Outsole. Our signature waffle outsole offers durable traction on paved surfaces.