It's too early to tell whether 3D-printed footwear will ever be more than a gimmick. Still, you have to give credit to sportswear brands for trying something new, even if in some cases 3D printing is only used to make outsole prototypes. Last year, Adidas began showing the potential of the technology with concepts like Futurecraft 3D, a running shoe made partially out of 3D-printed materials. And now the company's taking that one step further: it created a ready-to-wear pair for its sponsored athletes at the 2016 Rio Olympics. As its name suggests, though, the "3D-printed Winners Shoe" will be limited to those who win a medal in Brazil.