Complex sentence: The kind of crinoline that supported this style was sometimes known as a crinolette: the cage structure was still attached around the waist and extended down to the ground, but only extended down the back of the wearer's legs.
Split into simpler sentences: The kind of crinoline that supported this style was sometimes known as a crinolette. The cage structure was still attached around the waist and extended down to the ground, but only extended down the back of the wearer's legs.