[Material]: Our elastic folder is made of high quality PP material, which is waterproof and moisture-proof. It is not easy to break and deform.[Suitable Size]: The expandable backrest measures 12.8*9.6inch/32.5*24.5cm, suitable for A4 files. Each folder has 5 pockets, which can be easily subdivided and can hold a large amount of paper.[Snap Closure]: This file organizer is designed with a secure snap button, which can firmly fix the items stored in place during transportation.[Tag Organizing Tool]: The expandable folder is very suitable for your daily organizing needs. Tags can be used to easily find your files, remind you of archive contents and location, and keep all contents neatly classified.[Great Application]: This set of folders is suitable for home, office and school, and can be used as a personal gift or as a keepsake for employee birthdays. Besides, it is also the best choice for recording notes, projects, documents, business expenses and tax documents.