While these speedsters could easily pass the test on race day, they offer durability and soft, snappy cushioning to help push you toward your personal best when training. Zoom Air units in the forefoot offer a responsive feel to help propel you forward as you pound the pavement. A supportive fit and cushy Nike React foam in the heel make them the perfect complement to your everyday running routine. The bold blue colorway celebrates our history in sport and nods to one of the earliest Nike running shoes—the Boston ’73. Zoom Forward Nike ZoomX foam in the midsole is lightweight and provides high energy return while visible Zoom Air units in the forefoot give you responsive cushioning for an additional spring as you push off. Nike React foam in the heel helps to cushion your landing. Traction Perfected By Data Data from hundreds of runners was used to place traction where your foot needs it most, giving you grip on multiple surfaces. Secure Support Flyknit upper provides breathability in areas where your foot heats up most. It uses strong, stretchy yarns to create lightweight, secure support so your foot feels contained with every mile.