Seat foam?

matthon said
Last thing I'll add, as I found it interesting.
In the back of the rear seat, at the bottom, they added extra cotton between the springs and the burlap, sort of a lumbar support, 1st pic.
So, I recreated that when I upholstered it, 2nd pic.

Ah!! I had thought that mice or sometehing had gotten into mine and pulled the cotton through... all good info, thank you much :)