Tournure
The Tournure (or es. Polisón / ru. Турнюр / eng. Bustle / de.Tournüre) is s framework supporting the skirts. The Tournure was popular in the 1870s and 1880s. This design had a different look, but the main thing is to maintain the volume below the back.
Rus:
Турнюр (от фр. tournure — «осанка, манера держаться») или Басл (англ. Bustle – “суета”) – приспособление для придания объема сзади в 1870-1880-х гг.