We’ve seen before printed soles or inserts for shoes, but Nike moves it up a level printing the “upper” part of the shoe. Here’s a cool blurb from the Nike Website where you can learn more:

Nike Flyprint uppers are designed to help the world’s fastest distance runners run their fastest. And for that reason, its first articulation is in the Nike Zoom Vaporfly Elite Flyprint shoe. Created for Eluid Kipchoge, and driven by his feedback following last year’s Berlin Marathon and through a rapid-fire prototyping phase, the new upper improves the VaporFly Elite shoe and makes it 11g lighter than Kipchoge’s original pair.

I guess when you’re a world class runner 11g is a big deal…