I had a model of over 35 years ago and also lost it through life's moves! I remember the back was made of wide woven plasticy material. What a pain reliever it was. Now I have one of about 7 years. Do they still ship it in one big box? I remember, it was SO HEAVY that I think I hurt my back unpacking it. Seriously.
I suggested they start shipping it in 2 boxes to save the customers' backs. I wonder if they changed that?
So I do hang, but mostly on an orthopod, purchased about 35 years ago, too. It enables me to hang upside down in a "seated" position, which stretches out the lower back. I use the Teeter, too. Love the bat position! I wish everyone had the option to hang and decompress. - Bird