Deli Rio Pockets Display Book Is Easy To Use And Reliable. File Folders Usually Consist Of A Sheet Of Heavy Paper Stock Or Other Thin, But Stiff, Material Which Is Folded In Half And Are Used To Keep Paper, Important Documents Etc. Made Of 100 Percent Imported Pp Material. Anti-Static Design, Durable In Use, No Deforming. Removable Spine Inserts For Better Organization.