High quality materials and construction - Made from high quality polypropylene for strong, spacious plastic folders that resist everyday use. Very solid and safe storage - Built with durable polypropylene that is acid-free, PVC-free, and archival quality for long term storage. - Sturdy design resists cracking and deformation, offering reliable protection for your documents. - Expands well beyond expectations to accommodate essential papers while maintaining structure. Versatile storage and organization - Extension file folder designed to organize and store important papers or documents. - Multi-part design with divided sections to separate different types of documents, helping you avoid piles of paper and keep everything in one folder. Practical use scenarios - Office or home workspace: file and categorize invoices, reports, and correspondence for quick access. - School or study area: organize assignments, notes, and handouts to keep study space tidy. - Personal archives: store receipts, warranties, and financial records in a single, safe folder for easy retrieval.