The old style, lap belt only. I did have it recovered by a shop on my route. They installed the highest grade foam available (10 year warranty) and used mohair over that. We 50 somethings remember mohair from the old movie theater seats. It doesn't get hot, it's very comfortable and it wears like iron.
The foam UPS uses in those seats wears out in 18 or so months, it is so cheap.