Today RCLifeOn 3D printed shoes using flexible material. 3D printing offers not only hard plastics but surprisingly flexible filaments. The shoes were made by using TPU, FilaFlex and NinjaFlex. He printed the white TPU, which is quite a bit less flexible than the other two filaments, on the TEVO Black Widow. However, the Orca Cygnus printer managed the NinjaFlex like a champ, something most printers cannot do.