Waterproof Double Layer Zip Waterproof Double Layer Zippered Mesh Office File Organizer/Document Holder/Paper Pouch/Pen Pencil Case/Stationery Storage/Cosmeticspered Mesh Office check envelopes, invoice holder, bill storage, pencil bag, office products stationery supplies. 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. GUARANTEED Toughest, Strongest and most Durable bags on the market. Keeps your important items safe and secure. This bag is great for art supplies and made of high quality material 3x thicker then similar products on the market allowing it to support heavy items such as tools, cell phones, sketch pads, money, coins, receipt books, paints, and other supplies. The clear pouch makes for quick confirmation of goods. These pouches are water and soil resistant making them easy to clean.