LW-PLA and LW-TPU are excellent materials to use for fursuit stuff. Printing at around 50-60 % flow yielded the best results

Regular TPU is very good for creating flexible/rubbery and tough parts. Had good success by varying the infill density over a print to vary the softness/flexibility. Bambu labs' 95A HF TPU is actually much closer to the 85A hardness I tried before. As a side effect it does produce a fine white powder that seems to accumulate in the short PTFE tube where the filament feeds into the extruder.

In general I should switch over to tree supports instead of “regular” supports, as it saves material and time, and makes post processing a bit easier too.

Printing Bambu labs' 95A HF filament very slowly (under 30 mm/sec) yields very flexible prints. It seems the crystallization of the material changes as it's printed slower and possibly creates longer, more flexible chains? I discovered this when printing the hose segments for the connection between the backpack and the gas mask.