It works pretty well with most ckpts, but I recommend Anything 4.5
The helmet can be removed if you put "helmet, faceless" and similar tags in negatives, and also prompt what the characters face is supposed to look like. So this doubles down as just a stealth suit with no helmet if you want to try and put characters in it.
It was only trained on the "female" version of the armor, however it can generate male characters and body types in it quite well.
https://civitai.com/models/19403/chinese-stealth-suit-fallout
