Dual material cloth
A type of cloth made with two materials: PLA for the surface, and TPU for the hinges.
The TPU is a single layer and consists of singel straight lines; the TPU model requires some special settings in order to get it to print correctly: the infill pattern is set to triangles and made to exactly match the modeled pattern of hexagons.
For results, see https://youtu.be/CfHm44XliAw