The Nike Air Max Pre-Day combines original track aesthetics with updated Nike technology. The silhouette holds similarities to the shape of the 1970's Daybreak, with its arrow-like design, spearing through wind. The lime green upper is constructed out of 20% recycled materials, making it one of the greenest Air Max sneakers ever made. A new fully exposed Air bag heel nods to the Air Max's heritage of introducing visible Air. This new addition adds a more pronounced bounce to the wearer's stride.