Use the files to solve on-the-go document storage challenges as well as solving in-office filing space issues. The holders are compact secure and can expand to store large growing files. Add some flair to your office products but stay professional! Unique circle design keeps you trendy while staying organized at home the office and on-the-go. Durable acid-free polypropylene ensures documents remain protected and organized. Expanding files can be used in place of filing cabinets to help conserve space or the holders can be used simply to transport documents from one place to another.