Best Board Backed Envelopes of 2025

The Triplast Hard Board Envelopes are a must-have for anyone needing to safely mail or store important documents. They are perfectly sized for A5 paper and feature a sturdy construction that prevents bending, ensuring your items remain flat and crease-free. The convenient peel and seal strip makes packing quick and easy, allowing you to securely seal your items without hassle. Plus, these envelopes are made from 100% recycled materials, making them an eco-conscious choice for your mailing needs.

The Postmaster Do Not Bend Envelopes are designed for safeguarding important documents. With hard board-backed protection, they ensure that your legal papers, certificates, and A4 materials remain undamaged and professional. The C4 envelope size allows for unfolded A4 sheets, making it convenient for sending posters or CVs. Clearly marked with 'Do Not Bend', these envelopes help prevent any mishandling during transit, ensuring your mail arrives in perfect condition.

The iSOUL A4 Envelopes offer a convenient peel-and-seal closure, ensuring your contents remain secure and tamper-proof. Their perfect size makes them suitable for standard A4 documents, invitations, and cards, allowing you to send a variety of items with ease. Additionally, these multi-purpose envelopes are ideal for mailing everything from holiday cards to business correspondence, making them a versatile choice for personal and professional use. Lastly, being eco-friendly, they are made from recyclable materials, helping you to reduce your carbon footprint.

The Triplast Hard Board Envelopes are essential for anyone needing to send flat documents securely. Designed for A4 and A3 papers, these envelopes will not bend, ensuring your important certificates and reports arrive crease-free. The peel and seal strip makes packing quick and easy, saving you time and providing a secure closure. Additionally, these envelopes are a cost-effective solution, as you can write addresses directly on them, avoiding the need for extra labels.

The Blake C4 Envelopes are designed to enhance your mailing experience. With a heavy-duty board back, these envelopes provide excellent protection for important items like certificates, photographs, and prints. The strong peel and seal closure makes it easy for you to secure your contents while ensuring added security and longevity. Additionally, the printed message of "Please do not bend" on the front offers extra safety, helping to prevent any damage during transit. These features make the envelopes a reliable choice for your mailing needs.

The Triplast Hard Board Envelopes are an essential mailing solution, designed to hold unfolded A3 papers or A2 papers folded in half. Their sturdy construction, featuring a 120gsm kraft paper front and a 1000 micron board back, ensures that your documents remain flat and crease-free during transit. With a built-in peel and seal strip, sealing your envelopes is quick and hassle-free, saving you time and effort. Plus, these envelopes are a cost-effective option for postage, allowing you to write addresses directly on the surface without needing additional labels.

The Arpan Hard Board Envelopes are designed for secure and professional packaging. With a strong self-seal adhesive strip, you can ensure your items remain safe during transit. Their lightweight construction helps you save on postage costs, making them economical for regular use. You can easily apply sticky labels for addresses, streamlining the packing process. Plus, they are made from 100% recycled materials, allowing you to make an environmentally friendly choice without compromising quality.

The AKAR Do Not Bend Envelopes are designed to keep your documents safe and secure during transit. Their hardback board backing ensures that your contents remain flat, preventing any creasing or damage. The envelopes feature a striking red "Please do not bend" message, providing clear instructions for handlers. With an easy peel and seal closure, you can send invitations, photos, and important papers with confidence, knowing they are tamper-proof. Plus, the recyclable materials offer an environmentally friendly packaging choice.

The AKAR C4 Envelopes offer a robust solution for mailing important documents. With their hardback board backing, you can ensure that your contents remain flat and secure during transit, which is especially useful for certificates or photos. The "Do Not Bend" message printed clearly on the envelope helps protect your items from damage. Additionally, the easy peel and seal closure provides a secure and tamper-proof option for your mail, making the entire posting process convenient for you.

The Indigo Brown Manilla Envelopes are designed for quality and protection. With a size of 324 x 229mm, they are perfect for sending A4 documents, ensuring your important papers reach their destination safely. The 120gsm PEFC-certified thickness, combined with a sturdy 600gsm board backing, provides additional security during transit. The easy peel and seal closure, marked with 'Please Do Not Bend', offers you peace of mind, knowing your items are safeguarded against bending or damage. Plus, they are made from 100% recycled materials, making them an eco-friendly choice.