While these are also made out of rubber, they are much softer than what we consider typical rubber erasers. When used, gum erasers tend to crumble but don’t worry, this it supposed to happen! The crumbs actually help absorb the graphite. The nice thing about gum erasers is that since they crumble when erasing, they do not tear up your paper. However, they also tend to not last as long as other erasers.