Folding shipping bag MAILmedia B4 natron brown 150 g/m² with adhesive, without window

Folding MAILmedia B4 shipping bag in natron brown is made from 150 g/m² paper and designed to carry documents and flat items securely without additional wrapping. The bag folds to form a padded envelope-like parcel, sealed with a self-adhesive strip for reliable closure. This model does not include a transparent window, offering full privacy for enclosed contents while supporting postal and courier handling as well as storage during transport.

Advantages

The 150 g/m² paper construction provides a balance of light weight and tear resistance suitable for mailing documents and slim objects. The self-adhesive closure allows fast, tool-free sealing and prevents accidental opening during transit. The absence of a window ensures that contents are not visible, improving confidentiality. Its folding design reduces the need for additional envelopes or bulky packaging, simplifying packing and reducing material use.

Suitable for

• Sending invoices, contracts and printed materials by post or courier
• Packaging thin catalogs, brochures and magazines
• Protecting certificates, photographs and single-sheet documents during transport
• Storage of flat documents where a compact, sealed envelope is required

Key specifications

• Format: B4 folding shipping bag
• Material weight: 150 g/m² paper
• Color: natron brown
• Closure type: self-adhesive strip
• Window: none (no transparent window)
• Design: folding construction for flat items

How to use

Place the document or flat item centered on the inner surface, fold the bag along the pre-creased lines to enclose the contents, remove the protective liner from the self-adhesive strip and press firmly to seal. Ensure edges are aligned and the adhesive fully contacts the paper to create a secure closure. For heavier or irregular items, reinforce with additional paper tape at the seam if required by postal rules.

Recommendations

Store the bags in a dry, cool place away from direct sunlight to maintain adhesive performance and paper strength. Use for items that fit comfortably within the B4 folded dimensions and avoid overfilling to prevent tearing or adhesive failure during shipment.