The Difference Between Do Not Bend Envelopes and Rigid Mailers
Do not bend envelopes vs rigid mailers: which format is right for your mailing needs?
Key differences
Quick answer
Do not bend envelopes have a board back and paper front. Rigid mailers are board on all sides. DNB envelopes suit most documents and prints at lower cost and weight. Rigid mailers provide all-round protection for high-value artwork, glass-covered certificates, and items needing edge-to-edge rigidity. Choose based on the value and fragility of your contents.
Protection levels
The board back prevents flex, but the paper front offers limited impact protection.
All-board construction resists bending, impact, and compression from every direction.
Lower material cost and weight make them more postage-efficient.
Choose wisely: size and material or GSM guide.
When to use each
Both formats available
Board-backed envelopes and rigid mailers from ProcuraPack.
Browse do not bend envelopesFrequently asked questions
DNB envelopes have board back + paper front. Rigid mailers are board on all sides.
DNB envelopes, due to less material and lighter weight.
Rigid mailers, with all-round board protection.
For high-value artwork, mounted photos, glass-covered items, and irreplaceable originals.
Yes, if under 25mm thick and 750g. Rigid mailers are thicker and usually ship as parcels.
Part of our guide
Product Guide: Do Not Bend Envelopes
Expert guides on rigid mailers and board-backed envelopes for protecting documents, prints, and certificates.
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