Crinoline

Originally the crinoline, a stiff fabric made of horsehair and cotton or linen, was used to make underskirts and as a dress lining. The stiffened or structured petticoat was designed to hold out the woman's skirt and by the 1850s, the ladies wore it up in order the widen skirts to achieve the illusion of a tiny waist.

Soft bustles and fishtails

A bustle is a padded undergarment used to add fullness, or support the drapery, at the back of women's dresses in the mid-to-late 19th century. Bustles are worn under the skirt in the back, just below the waist, to keep the skirt from dragging

The fishtail dress is easy to spot thanks to its main feature which is a flowing, scalloped hemline which is often longer at the back than at the front