Made of high-quality PP material, it is waterproof, moisture-proof, and tear resistant, which can effectively protect your documents. The thickness of this file bag has 14 threads, which is better than other file bags with the same appearance. The texture of the document bag is transparent, making it easy to inspect documents. The envelope shape holder is classic, with a plastic snap closure to prevent slipping and easy to store. It adopts a rounded design, which will not hurt hands. It is very suitable for storing documents, files, photos, letters, forms, office supplies, and other learning materials