Pendaflex Premium Reinforced Extra-Capacity Hanging File Folders, 1" Expansion, Letter Size, Green, Pack Of 25 Folders - Make sure you have enough room to accommodate growing files with Pendaflex hanging folders. Strong enough to handle bulky files and everyday usage, these expandable hanging file folders are reinforced with pressboard inserts and polylaminate at high- stress points to help ensure they last. Using the included tabs and inserts, it's easy to create a custom file system that works for you.