So, what we have is a style of dress that both helped to destroy the old guard, and begin the new.
But on to discussing the garments themselves.
The skirt is referred to as an underskirt, but it was entirely acceptable is casual dress to wear it without an over gown. Also this entire ensemble probably weighs only a few ounces. You can clearly see in the detail images tow things, one is how incredibly fine the muslin is, and also how much it was stressed during its worn life throughout the bodice area.