The flexible portions of the watch band are all printed in ninjaflex but other flexibles would likely work well too. The clasp was printed in PETG but again other materials will likely work well too. I would try to avoid PLA for the pivot rod as it might become brittle and crack but it will probably still work mostly well. Print Settings: Layer Height - 0.2mm Infill - 20% Walls - 1.2mm Top/bottom layers - 0.8mm