As parkdalegardner said, for converting figure to static prop. You will want to weld on reimport however or you will have body part seams at group boundaries. Additionally you can simplify the single group process by following these directions...

Export your clothing item with only preserve existing material names checked.

Reimport with only weld identical vertices checked.

Open the grouping tool and click add new group, naming it.

Click add: All; the entire prop will turn red indicating it is all one group.

Your figure/conforming clothing item will now be a seamless, welded static prop with pre existing uvs and material regions. You can use material collections intended for the original garment if you wish.

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