Waterproof surface: The surface of the stand up zipper pouches are smooth and has a waterproof function. The inner film can protect the items from moisture and dust. It is very suitable for packaging dry food to protect the freshness and safety of food. .Transparent window design: Kraft paper stand up pouch provides a transparent visual window to help you easily see the contents and the remaining amount of the bag. The smooth top zipper lock can easily seal the bag for easy access at any time. The opening of the bag can also be heated. The sealing machine is sealed. .Strong material: Ziplock kraft paper pouch is made of food-grade kraft paper and the inner layer of the waterproof membrane. It is safe and environmentally friendly. The kraft paper is durable and reusable. The bottom is thickened and can be placed in the display window of the goods. .Packing includes: 50pcs Kraft paper zip lock bag, size: 9*14 cm/5.5x3.5 Inch, abundant in quantity, enough to meet your needs, for example, suitable for cafes, grocery stores, supermarkets, offices, etc., suitable for festive candy, such as: Halloween, Christmas Festival etc. .