Nike just leveled up marathon dominance with the Alphafly 4.

Engineered for pure speed, this beast delivers 10% more energy return and sheds 5% of its weight.

Featuring cutting-edge ZoomX LT foam and a precision Atomknit upper, it’s built to crush world records.

Experience the future of propulsion when the limited drop hits Nike.com on September 17.

The race starts now.