The Nike Vaporfly first came out in 2017 and their popularity, along with its performance, prompted a new series of running shoes . The Vaporfly series has a new technological composition that has revolutionized long distance running since studies have shown that these shoes can improve run times up to 4. 2%. The composition of the sole contains a foamy material, Pebax, that Nike has altered and now calls it ZoomX (which can be found in other Nike products as well). Pebax foam can also be found in airplane insulation and is "squishier, bouncier, and lighter" than foams in typical running shoes . In the middle of the ZoomX foam there is a full length carbon fiber plate "designed to generate extra spring in every step" . At the time of this writing Nike had just released its newest product from the Vaporfly line, the Nike ZoomX Vaporfly NEXT%, which was marketed as "the fastest shoe we’ve ever made" using Nike's "two most innovative technologies, Nike ZoomX foam and VaporWeave material" . To see Nike Vaporfly controversy regarding the Tokyo 2020 Olympics see below.