Bustle Undergarment Structure had very different ways of attaching and making the bustle underneath the full skirts. Bustle support constructions developed ranged from padded, cushion like devices to half hoops of steel.
Beautiful Bustle Cage of iron hoops and linen bands. This is an example of a bustle cage in They wanted the dress to hug the body around the waist but make the butt area appear larger. This would be worn underneath the dress.