Strong C5 Manilla Board-Backed Envelopes – Durable Brown Postal Mailers

Board backed envelopes are strong, durable mailing envelopes specially designed to protect important documents during transit. Built to prevent bending, tearing, and creasing, they help ensure your documents arrive in excellent condition every time. Our brown board backed envelopes are made with a sturdy 120gsm front paper and feature a thick 550gsm board backing that stays firmly in place for maximum rigidity and protection.
With a flat, smooth surface, these envelopes easily accept stamps, labels, and adhesives, and can be written on using a biro pen or permanent marker for added convenience. Their opaque brown finish keeps the contents private and confidential, making them ideal for sending sensitive or important paperwork. Manufactured from strong basket-weave recycled paper containing a minimum of 90% post-consumer waste, these envelopes are both reusable and recyclable, offering a practical and environmentally friendly packaging solution.