Pluginless Robert's bodies 0.3
Step #51 in the Total Overhaul list
borok, Robert Bahamut Westly and Moranar
Featured in Mod Lists:
Pluginless version of Robert's Bodies.
Check the "Files" tab, look for "Pluginless Robert's bodies 0.3 (vanilla underwear)".
Note that this mod is not meant to be used on its own, you also need Robert's Bodies Color Tweaks for Vanilla Heads to provide textures (list followers: that's next).