Blanche wrote
Since when is upholstery safety critical? Personally, I consider it
the last thing to worry about.

Obviously you've never spent any length of time flying in seats with no
padding under or behind you, and didn't mind the bruise in the shape
of the metal frame remaining on your lower anatomy for 3 days.

Or perhaps my lower anatomy is quite adequately padded as is, with no
need to resort to artificial padding.

Michael