Very elastic, sits very well - but only for sofas with loose seat cushions !!!

What I had not thought, but as the reference can now be anything that I wanted to relate material in others, the loose cushions of the couch (see my other reviews), so the terms wanted to draw only on the bare frame of the sofa - as I need to still come up with something, as I get the strong elastic band stretched the seat without the cushion to me now - with as stuck as actually vorgesehen- inside.
When used properly the reference but sits perfectly and feels comfortable and top quality!