About 1868, the crinoline silhouette went out of style. The smooth, distinctly bell-like shape of the crinoline supported skirt began to change form, with the fullness moving towards the back of the shirt. This new skirt shape required a different kind of understructure: the bustle. Essentially a cage crinoline cut in half, the bustle supported the back of the skirt, while leaving the front unsupported. In the early years of the 1870s, the bustle usually extended from the waist to about the mid-calf. A c. 1871 bustle of cotton with metal boning can be found here. The bustle was fashionable until about 1875, when it went out of style as skirts were fitted closer to both the front and back of the body. Beginning about 1883, the bustle enjoyed another round of popularity until finally going entirely out of fashion about 1890.