Unlike Standard Project Folders, the File Jackets are sealed on three sides, providing more protection and room, if needed. These acid-free polypropylene 8 1/2 x 11 files feature a 1-inch gusset, allowing the file jacket to expand. Designer V-cut front provides easy access to documents. Full-length tab and lined front panel feature write-on technology that allows you to identify and organize folder contents. Works with pencil, ball point pen or permanent marker.