The LoRA is intended to produce a subtle effect of water droplets on a face, though it seems to work on other surfaces as well.
While the description is "rain" it will augment sweat as well, or any droplets anywhere.
Why this LoRA when Z-Image can already produce this effect? When I created it there was a condition where I couldn't get rain to appear on a subject, or their clothing (rain coat), so I made one that can punch through the use of excessive prompting and other LoRA. You may notice that enabling other LoRA can obliterate the usefulness of another and while I don't think this is immune to being destructive, or avoiding the condition, it allowed me to accomplish the task.