1. Double Lock Protection: Our portable document bag features a left and right doublelock design, ensuring secure fastening and dual lock protection. This safeguards your important papers and prevents stored items from falling out. 2. Convenient Transport: This portable document bag is designed to organize standard A4sized papers, easily separating test papers, materials, and business documents. It keeps your files neatly arranged and accessible from the outside. 3. Durable Document Protection: Made from sturdy PP material, this document bag keeps your papers dry and secure while effectively shielding them from moisture. No need to worry about fading or deformation—our bag is built for longlasting use. 4. Easy to Carry: The portable handle is reinforced and thickened for effortless document transport, with strong loadbearing capacity. Our document bag makes carrying papers easier and saves effort.