Question How to have clothing move with animated character?

I have a game released where I use the blender rigify add on to create animations and then I export them into unity via fbx. I can parent objects to certain parts of the rig and they will move with it.

What if I want to add clothing to move with the mesh? ex. Pants. Pants cannot simply be parented to a piece of the rig as they must be deformed with the legs. One solution I can think of is to have the pants added/parented in blender, but what if I want 60 different pairs of pants for the user to choose from? What is the best way to accomplish this?

 

As far as I am aware, this is the only solution. Once you bring it all into Unity, then you have a few different options to go about swapping them.

This is a pretty good video on the topic:

 

https://forum.unity.com/threads/tutorial-how-to-make-clothes-animate-along-with-character.475253/