Upholstery and Interior Questions

[jweb]

Well I don't know about the foam or covers you mentioned but I do know a little about foam itself.

You don't want to make the cushion or back thicker. This will mess with how they fit together. It can also be an issue if you're tall, sitting higher isn't going to help.

Foam usually has a density and ILD rating ( see attached chart) .
We use this Q51 or Q61 as the base layer for all of our seats.

https://www.rexpeggfabrics.com/index...82%7C149%7C150

https://www.rexpeggfabrics.com/index.php?prodID=657

https://foamonline.com/wp-content/up...UEuNT17m9Vfc0d

I would recommend using a foam similar to these for the bottom, the back isn't as critical since you aren't applying much pressure.