Upgrades?

I don't see any option to upgrade these anywhere on the item and I don't have sufficient proficiency for any upgrades but does anyone know if they can be upgraded?

I know these can't be metalware upgraded for some reason.

Edit: They come with the standard clothing upgrades. You don't need prof to see them, just go to any tailor look at "Modify Item" option and it'll show any current upgrades it can have just grayed out.