Nike's fastest, most efficient marathon shoe just keeps winning. Shalane Flanagan stormed to victory in it in New York, becoming the first American woman to win that marathon since 1977. She joins runners like Galen Rupp (2:09:20, Chicago), Edna Kiplagat (2:21:52, Boston) and Eliud Kipchoge (Berlin, Breaking2), all of whom took 2017's biggest races in the Nike Zoom Vaporfly 4%