Trained on pictures of men wearing the legendary GP-5 gas masks, as well as variations of clothing from the rubber fetish category: overalls, heavy wetsuits, latex, and lycra tracksuits.

It works fine with "Inpaint only masked" mode; you can try adding the word "closeup" to the prompt for different results.

Not very good at making gas masks with a hose attached; maybe I'll try to improve it in the next version.