Pack of 500. Featuring a write-on block on the package for mentioning date of packaging and contents, Double Zipper Sandwich Bags are made from low density polyethylene. These sandwich bags, which meet FDA requirements for food applications, are completely recyclable. The Double Zipper Sandwich Bags come equipped with a double zipped closure for keeping for keeping sandwiches fresh and crispy, all day long, while facilitating fast and easy sealing. They are also great for storing and packaging of pre-portioned foods.