Nike Uses 3D-Printing to Create a Crazy Light, See-Through Shoe

Using a modified 3D-printer, Nike created a new upper it's calling Flyprint, which doesn't use fabrics or yarns like more traditional footwear. Instead, it's created from a thermoplastic polyurethane (TPU) that is first melted, then laid out with painstaking detail to create a single-piece upper that is extremely ...