📦 Brown solid cardboard Lettpac E4 envelope (280×400 mm) - safe and eco-friendly packaging for flat shipments!

Are you looking for a durable, rigid envelope that will protect your documents, brochures or discs in transport, and at the same time be friendly to the environment? Lettpac E4 (280×400 mm) is a solid cardboard envelope with a weight of 400 g/m², created with professional shippers, online stores and everyone who cares about the flawless condition of the sent materials in mind. It is characterized by high durability, recyclability and an elegant, brown finish that emphasizes attention to every detail. All our solid cardboard envelopes have a FSC certificate, which confirms the responsible origin of the raw materials.

🌟 Construction details and benefits of the Lettpac E4 solid cardboard

• Durability and rigidity: solid cardboard 400 g/m² effectively protects the shipment from crushing and deformation, protecting the contents even in demanding transport conditions.
• Content protection: rigid construction keeps documents, catalogs or brochures in a safe, flat form. With widened sides, you can pack slightly thicker publications.
• Eco-friendly materials (FSC): 100% paper envelope, without plastic elements. Easy to process, fully biodegradable - supports the company's eco-friendly image.
• Professional look: smooth, brown surface of the cardboard gives the shipment an aesthetic character, strengthening the positive impression at the recipient.
• Quick closure (self-adhesive strip): eliminates the need for packing tape, making the packing process smoother.
• Tear-off ribbon (tear strip): convenient and quick opening - the recipient does not need scissors or additional tools.
• 280×400 mm format (E4): ideal for sending larger documents, magazines, folders, as well as small electronics where protection against bending counts.

📦 What can you send in a Lettpac E4 envelope?

• 📑 Documents and office materials: larger sheets, contracts, certificates, presentations.
• 📚 Books, magazines, catalogs: rigid construction protects against bending and crushing of covers.
• 💿 CDs, DVDs, Blu-rays, games: securely holds boxes, preventing them from cracking.
• 🖼️ Photos, graphics, prints: E4 format ensures adequate space for large materials that need to remain flat.
• 🔌 Small electronics and accessories: pendrives, cables, chargers - safe thanks to the rigid form of the envelope.

💼 Who are rigid cardboard envelopes for?

• 🛒 E-commerce: stores sending books, discs, electronic accessories or gadgets. Cardboard envelopes are light and usually do not require additional fillers.
• 🏢 Offices, offices, law firms: important documents in a larger format will arrive without damage, and a rigid envelope emphasizes a professional image.
• 🎨 Creative agencies, publishers, printing houses: projects, trial prints, portfolios and promotional materials maintain their form in transport.
• 🏭 Technical and electronic industry: shipping instructions, service documentation and small components.
• 🔧 Service companies: repaired equipment, parts, documentation - everything can be conveniently and safely packed in this envelope.

⚖️ Cardboard envelopes vs bubble envelopes - when to choose each of them?

Both types have their advantages, but they work best in different situations. Here is a brief comparison:

➡️ When should you choose a solid cardboard envelope?

• Contents cannot bend or crush: important documents, graphics, photos that need to remain in perfect condition.
• You prioritize ecology: 100% paper envelopes, without plastic elements; easy to recycle.
• Professional appearance is important: the cardboard envelope looks sturdy and neat, which leaves a good impression on the recipient.
• The product has a regular, flat shape: perfect for books, catalogs, disks, posters.

➡️ When will a bubble envelope be better?

• Contents are sensitive to shocks: delicate electronics, ceramics, glass parts.
• You are sending small, irregular items: bubble wrap helps to adapt to different shapes.
• Lower packaging cost matters: bubble envelopes are often cheaper and easily available.
• Ecology is not a priority: harder to recycle due to the plastic layer.

In practice, many companies use both solutions, choosing them depending on the type of item being sent.

🚀 Other sizes and customization

Not every product - including Lettpac E4 - fits into standard packaging? Use our interactive configurators to create the perfect box for your business:

• Custom-sized Boxes – design a box that perfectly fits your product's dimensions. Choose the format, cardboard, and quantity – all online, without leaving the office.
• Printed Boxes – create your own packaging with a logo, graphics, or marketing message. The configurator allows you to quickly order packaging that builds your brand's recognition.

💬 Do you have questions or need a personalized offer?

Do you want to order a larger number of envelopes, are you looking for other formats, or non-standard packaging solutions? Use the PRO form and let us know exactly what you need. Together we will create the perfect packaging for your business!

Lettpac E4 (280×400 mm) - choose rigidity, ecology and professionalism in shipping your products!