First they tried a "stay," which is another name for a corset worn in the 16th century, with a long hoop skirt attached, designed to give fuller shape to dresses.
Next they tried a "bustle," which was worn in the 19th century to hold up a woman's skirt behind her, giving it an extra-poofy shape.
They tried a model of the first bra, made by Mary Phelps in 1914 as a more comfortable alternative to the corset. It was maybe a little too comfortable.
Then they wore a latex "waist trainer"—a modern version of the corset popularized most recently by the Kardashians.
The women commented that the styles went from restrictive, to more loose-fitting, and now, back to restrictive again. So, THANKS FASHION!