Engineered to maximize speed and minimize weight, this performance running shoe sits on nitrogen-infused cushioning that transforms every landing into propulsive forward energy. Perfect for: Runners looking to build or maintain speed in an ultralightweight shoe that propels every stride forward with springy energy.Upper: Openwork knit provides superior ventilation while flexing and recovering with every stride. Cushioned collar and tongue ensure comfortable lockdown for distraction-free running.Midsole Drop: 8mm. Classified as a mid-drop measurement, it pushes your foot forward to support a more natural mid/forefoot strike.Lower: DNA FLASH v2 lightweight midsole transforms soft landings into propulsive returned energy. RoadTack Rubber tread provides durable footing and enhanced rebound with every stride. Speed: transforms impact absorption into propulsive energy with ultralightweight cushioning Ultralightweight: provides high-performance cushioning with extremely minimal weight Cushioning: absorbs impact and distributes weight for consistent, buoyant comfort under each step Lace-up style Removable, cushioned insole allows for custom orthotics DNA FLASH v2 nitrogen-infused midsole provides explosive energy return to power up your pace RoadTack Rubber tread partially made with recycled materials puts lightweight durability and rebound under every stride Textile and synthetic upper and lining/rubber and synthetic sole Imported