1. High-quality materials: This accordion-style folder is made of ultra-durable and environmentally friendly polypropylene (PP) materials and Oxford cloth. It is waterproof, has high strength, and is not prone to cracking and deformation. 2. Numerous compartments: It has 13 independent pockets, suitable for storing A4 and letter-sized documents. Each pocket can be expanded to 1 1/8 inches, which is enough to safely store all important documents without having to bind the documents together. At the same time, it is small enough to fit into a backpack, making it a great helper for your office life. 3. Zipper closure design: This expandable folder features a zipper design, which keeps the internal documents more secure. Even small cards won't fall out, making it safe and convenient to carry. 4. Multi-functional use: It can keep your vacation documents, vouchers, cards, and coupons tidy and organized. It is an ideal document organizer for home, office, school, and travel use, being both simple and stylish. It is also suitable for storing commonly used small items such as cards, pens, rulers, highlighters, and keys. 5. After-sales service: We are committed to providing customers with satisfactory service. If you are not satisfied with our document storage bag, please contact us immediately via email, and we will provide you with a satisfactory solution.