The skirting on a gown bears some examination. First of all, under everything there is a farthingale. Then there is a bumroll that supports the skirt in the back. Over all that, there is the underskirt, which is usually made of a material that matches the front panel of the bodice. The, over that, there is the overskirt. This is typically open in the front, to allow the underskirt to show through. Costumer's Cheat: With some careful construction, it is possible to make the under- and overskirts a single piece. They just need to look like they are two pieces.