The B5 cardboard back envelopes from MAILmedia are a practical solution for the secure shipping of documents and other flat items. These envelopes are made from sturdy kraft paper with a paper weight of 90 g/m², ensuring high stability. They are designed without a window, providing complete coverage of the contents and thus protecting the confidentiality of the materials being sent. The adhesive closure with a protective strip allows for easy and reliable sealing, keeping the contents securely in place. These shipping envelopes are ideal for use in the office, by shipping service providers, or for personal purposes. They offer an eco-friendly alternative to traditional plastic packaging and come in an appealing brown tone that is both functional and aesthetically pleasing. The cardboard back envelopes are versatile and are perfect for sending letters, documents, or other flat items.