Note: this mod has not been done by me, but I cannot find its author.
I edited it so cum can stick to most of the hood.
This is a normal PNG hair mod, so it cannot be added to another hair mod.
See also the Nun Outfit by dantethedarkprince.
I have a little problem with the forum search. I found a nun costume somewhere here referring to a fitting "hair" mod. But the link to some forum post leads to the forum root. So, as a good user, I started forum search to find "hairs" for nun. Well, didn't work like expected because I get...