Mailing bag MAILmedia B4 brown unglazed with table print and 4 viewing windows

MAILmedia B4 brown unglazed mailing bag is a paper envelope designed for sending documents and flat items in B4 format. The bag is made from uncoated brown paper and features a printed address table and four transparent viewing windows that allow portions of enclosed documents to remain visible. The combination of a writable table and windows helps streamline sorting, addressing and record-keeping for routine office mailings, invoices and correspondence.

Advantages

The unglazed brown paper provides a durable, recyclable outer layer suitable for standard postal handling while remaining easy to write on. The printed table enables clear, legible addressing without separate labels, and the four viewing windows let recipients or postal staff see multiple data fields or parts of the enclosed documents without opening the bag. The design supports efficient automated or manual processing and reduces the need for additional inserts or labels.

Suitable for

• Sending invoices, statements and financial documents in B4 size
• Mass mailings and bulk post where visible addressing is required
• Internal document transfers and record-keeping between departments
• Archiving or filing of flat documents with visible reference fields

Key specifications

• Format: B4-compatible mailing bag for flat documents
• Material: unglazed brown paper
• Addressing: printed table for direct writing
• Viewing: four transparent windows for visible document sections
• Closure: standard adhesive or tuck closure suitable for postal use

How to use

Place the B4 document or flat item inside the bag so that the relevant parts of the document align with the four viewing windows. Fill in the printed address table with recipient and sender information using a pen or marker. Secure the closure according to the bag design and prepare the item for posting or internal distribution. For bulk mailings, pre-fill addresses and verify window alignment before sealing to ensure automated sorting systems can read visible fields.

Usage recommendations

Use compatible B4-sized documents and ensure the most important address or reference information is positioned behind the windows for immediate visibility. Avoid overfilling to prevent bulging and potential damage during transit. Store bags in a dry environment to preserve paper quality and adhesion.