Made of colorful super durable translucent polypropylene - virtually indestructible. Innovative vertical filing system allows you to see all your important documents at once. Each level has an index tab, and you can write on the folders too. Each file pocket is color coded and easily removable for individual use. With its carrying case, it can be used as an expanding file. The system can be removed from it's case and carried in a briefcase, or stored in a filing cabinet. Can hang on a wall or a door. Includes blank stick-on labels. Letter size.