Removable/Reusable Page FlagsAllow yourself to quickly retrieve data from dense documents, textbooks and personal planners. After the flag is no longer necessary, simply remove it and reuse it. Using a color-coded system is a great way to keep track of important information and messages. Plus, for added organization capability, the flags can be written on with a ballpoint pen, pencil or permanent marker—so you can make labels or add notes to the flags. Color(s): Red.