A high-compression archive format that requires a 3rd-party utility like 7-Zip or PeaZip to open.
This specific "piece" of software is designed to add "needs-based" immersion to the game world.
The file likely refers to a compressed archive containing the Nature Calls Facilities mod for The Elder Scrolls V: Skyrim . This mod is part of a larger collection of utility and immersion additions for the game's Anniversary Edition. 🛠️ Mod Overview: Nature Calls Facilities
It typically requires the FNIS (Fores New Idles in Skyrim) tool to be run after installation to ensure the new animations work correctly.
Adds functional restroom facilities or toilets to the Skyrim environment.