What is a roll end tuck front (RETF) mailer box and why is it the e-commerce standard?

The Roll End Tuck Front (RETF) mailer (FEFCO 0427 style) is the undisputed industry standard for e-commerce, D2C brands, and subscription boxes.

### Structural Features:

• Single Piece of Corrugated Board: Manufactured from one continuous die-cut sheet without pre-glued joints.


• Double-Wall Side Panels: When folded, the side walls roll over and lock into the base, creating double-thick sidewalls that provide immense crush resistance.


• Front Locking Dust Flaps: Two rounded wings tuck securely into the front wall, keeping the lid shut tight throughout courier transit without tape.

### Why E-Commerce Brands Love RETF:
1. Unboxing Experience: Opens horizontally like a treasure chest, immediately showcasing the branded products nestled inside.
2. Double-Sided Printing: Allows full-color printing on the outer shipping face and vibrant storytelling on the inner lid.
3. Ships Flat: Packed in compact bundles of 25–50 units, taking up minimal warehouse space until assembled.