Waterproof Double Layer Zippered Mesh Office check envelopes, invoice holder, bill storage, pencil bag, office products stationery supplies. Made of high-quality durable PVC material with waterproof surface and metal zipper. GUARANTEED Toughest, Strongest and most Durable bags on the market. Keeps your important items safe and secure. Zipper design prevent the items lost inside. Double space inside space can deposit a variety of documents and data such as study and office supplies. Great for holding stationery, study or craft supplies, cosmetic, makeup tools or small accessories