PREMIUM MATERIAL: Made of high-quality PP material, the binder pockets are durable and waterproof, able to protect your items from water and dust, ideal for long-term document storage. Large capacity: 12 x 9.4 inches, standard envelope size. Can hold up to 50 sheets of paper to meet your large capacity needs. Can be used to store bills, documents, information, etc. Transparent Folders: Transparent stylish folders keep contents clearly visible, making documents easy to find without opening the envelope. Product Design: The 11-hole file folder is suitable for offices and is a better organization option than ordinary polyethylene file folders. Additional tag pockets make college sorting and retrieval easier. EASY STORAGE: The binder storage box is portable, keeps your items organized and helps you declutter, the envelope bag can be used at school, home, work, office travel and business trips.