After using it, sharpen and the Sleeve and Sleeve mini erasers disappear under a red, black, or blue cover. This cover not only protects against dirt, but also allows you to make precise correction or to accommodate shavings. In 2007, the Sleeve line was awarded by ISPA for its ergonomic and easy use in the category “Back to school”. One more proof that items as basic as erasers may always be improved and it echoes in Faber-Castell’s slogan: Make simple extraordinary.