A sofa we bought 10+ years ago had some kind of black fabric stapled across the bottom. That fabric rotted and turned to 'soot'. Today we carefully unwrapped it from bubblewrap and removed what remained.

Nobody needs their new carpet covered in 'soot'.

Now we can offer guests somewhere to sit. 😆

Bottom of a leather sofa, showing staples round the edges with tiny piece of black fabric trapped behind them.