Ultimately, I think TPU (thermoplastic urethane) or some other TPE would be best for the final product. That being said, an initial run in any material would be useful at this point, just to test the print-ability of the design. One thing in particular I’m curious about is if 1 mm thickness is sufficient, or if 1.5 or 2 would be better. Let me know how it turns out, or if you run into any problems!