Oh no,, that’s not necessary,, I just meant cloth, leather, or vinyl !! Hard to tell from a pic !! Your sofa, I think, is part of the Heritage line by Drexel and is quality furniture !! The castors were likely because of the length,,would be difficult to move at 9ft long !! Castors made it easy for the housewife to roll out,clean behind, and roll back in place !!