The Faber-Castell Kneaded Eraser is the perfect rival to pencil marks! It's made out of a soft rubber material (PVC-free) that has strong plasticity that does not stick to your fingers. It can easily be torn and shaped without any mess, crumbs, or residue. If it ever becomes hard just pull, twist and knead repeatedly with warm hands to soften. It comes in a plastic case to store comfortably and avoid it getting dirty inside a pencil case.
It is perfect for removing charcoal, pencil, and pastel work.