Mailing cushion folding shipping bag MAILmedia K-Pack B4 360 g/m² White — paper padded envelope

MAILmedia K-Pack B4 paper cushion folding shipping bag in white is a padded paper mailing envelope designed for sending documents, flat items and small products with light protection. The 360 g/m² paper construction combines a paper exterior with internal cushioning to reduce shock and abrasion during postal transport. The foldable B4 format is space-saving in storage and convenient for packing single-sheet documents, brochures, thin catalogs and small retail returns while using a recyclable paper-based solution.

Advantages

The 360 g/m² paper provides a sturdy outer layer while integrated cushioning adds protection without bulk. Foldable design reduces storage footprint and simplifies handling, and the white surface offers a clean appearance suitable for printed addresses or labels. The envelope balances light protection and low weight, helping to keep shipping costs down. Being primarily paper-based, it supports recycling streams where paper padding is accepted.

Suitable for

• Postal shipments of documents, letters and certificates
• E-commerce parcels containing printed matter, thin electronics or accessories
• Retail returns and sample deliveries
• Mailings where a paper-based, recyclable outer packaging is preferred

Key specifications

• Format: B4 foldable envelope suitable for flat items
• Material weight: 360 g/m² paper construction with internal cushioning
• Color: white exterior for clear addressing and labelling
• Protection level: light padding for shock and abrasion resistance
• Storage: foldable to save space when not in use

How to use

Insert the flat item or small product into the envelope opening, align it to ensure even coverage by the cushion layer, then fold or close according to the bag’s folding design. Apply address and postage information on the outer surface or affix a shipping label. Ensure closure is secure before handing over to the carrier; if additional sealing is required, use appropriate tape across the flap without damaging the paper surface.

Recommendations

For best results, use the MAILmedia K-Pack B4 for single-sheet documents, thin books, printed materials and small, non-fragile items. Avoid sending heavy, sharp or highly breakable goods without additional protective packaging. Store envelopes flat in a dry environment to preserve cushioning properties and ensure clean labelling surfaces.