Solvent-only upholstery
An S-coded fabric is stating that water will damage it. Hot water extraction on S-coded upholstery produces rings at the boundary of every wet area, shrinkage that distorts seams, and sometimes a stiffened, papery hand across the whole panel. The damage appears as the piece dries and is generally not reversible. Solvent cleaning achieves a good result on these fabrics with none of the risk.