Interesting subject matter. A good few boats I have looked at are very spartan in their upholstery - a bit like caravans. Very thin cushions OK for weekending but not really comfortable enough to match the sofa or bed at home.

I've just pulled all the cushions off our (very comfy) settee at home, to see that they are made of foam (no springs). Beneath, however, is a lattice of material straps which give added "bottom absorption"

Can this be replicated on the boat I wonder? Or, alternatively, should we use a thicker, better quality of foam?