All suede and nubuck leathers are produced using a buffing process, which creates the smooth velvet-like surface of the leather. Buffing leaves a nap of small fibres on the surface of the leather. These small fibres can sometimes come off the leather and lodge onto other fabrics or materials. It’s called ‘crocking’ and is an inevitable possibility when dealing with these kinds of leathers. These small fibres can produce what looks like a stain on other material, but it’s something that a good leather / suede cleaner should be able to remove. Anyone purchasing a suede or nubuck garment should be aware of the risk of crocking and keep the garment from rubbing against any precious materials, especially light colored ones where the small fibres would be most apparent.