3D printing things that don't really benefit from being 3D printed has long been a publicity stunt to make brands appear innovative. With the new Nike 3D printed TPU bra, FlyWeb, I'll be honest, I can't tell. The idea of mesh to keep cool makes sense, but does it need to be 3D printed? Let's see how Nike's newest athlete endorser and three-time Olympic gold medalist Faith Kipyegon performs in it. Nike says it expects more products featuring this technology.