F3 Flatpack Large Letter Size
F3 corrugated cardboard envelopes are for shipping A4 brochures, calendars and artwork. Are you looking for tough flat mailers to ship your artwork and illustrations safely in the US postal system?
If you're using stiffeners, void-fill or airbags in your packaging, there is usually a better way to package what you're sending.
For postage, the Lil F3 flatpacks are the best corrigated cardboard envelopes, providing heavy-duty packaging for delivering A4 brochures, calendars, DVDs, photos, photo frames, diaries, journals, arts & crafts and more through the postal system.
The F3 is made from 150 gsm 'Kraft' e-flute corrugated board; very stiff, tough stuff. Every single flatpack in our range uses our leading hot melt peel'n'seal / red tear-strip system for easy sealing and easy opening.
Plus, like all of our postal packaging, they come with green credentials out of the box - 100% recyclable and FSC certified Tough packaging doesn't get better than this!