1. This expandable folder is made of plastic material, waterproof and tear-resistant, lightweight and easy to carry. Widely used in offices, schools and homes. 2. Each expandable folding folder has 12 letter-sized pockets. Each file pocket measures 12.8x9.64 inches. It can easily hold 360 sheets of letter-sized paper, documents, files, etc. 3. Suitable for organizing documents, meeting documents, certificates, receipts, school test papers, student homework, etc. 4. There are labels on each interlayer, which makes it easy to find the file type in different pockets. Clear classification helps to identify files immediately for quick access. 5. Rope lock, easy to use and carry. The folding folder provides you with a high degree of privacy and is convenient to carry with you.