Wonder twins of synthetic fiber
Vectra, amazingly, was used for ladies stockings before it “began showing up in carpeting and upholstery in the 1960s, then faded from view.” Those must have been some rugged stockings. At least one chair, reupholstered with Vectra around 1968, stubbornly refuses to fade away. The Herculon on a non-matching couch is still in good shape too. The fabric on both these pieces of furniture is bound to outlast the frames, springs, and cushioning.