With the Post-it Flex Write Whiteboard Film, you can instantly transform almost any surface into a whiteboard. The film can be written on with a whiteboard or permanent marker. To clean it, you only need water. The whiteboard film adheres fully and can be removed without leaving any residue. The material sticks to primed and painted drywall, painted or stained wood, glass, painted steel, or chalkboards. A microfiber cleaning cloth and a water bottle are included in the package.