The Smead Heavyweight Poly File Folder is made of an extra-heavy, PVC-free, 17 point polypropylene material designed for frequent use. Featuring 1/3-cut tabs in assorted positions, these folders are waterproof and tear-resistant, scored for 3/4" expansion. The front panel is undercut, and the top corners are rounded for added durability. With acid-free, archival quality, these folders ensure longevity for your important documents.