NIKE Air Zoom Alphafly NEXT% Marathon The upper is made of lighter and more breathable Atomknit material The large crooked shape on the outside and the low front and high back upper all bring stronger Sense of speed! Add two Zoom air cushions to the forefoot of the sole to match ZoomX brings stronger resilience.Aerodynamics Styling. The forefoot adopts an air connection design, so that the carbon plate configuration of the sole can be used The visual shape is more futuristic.