Mailing Bags | Strong Grey Mailing Bags for Secure Shipping (100 Pack)

Mailing Bags for Secure UK Dispatch

These mailing bags are designed for businesses that require a reliable, professional, and efficient method of dispatching non-fragile goods. Commonly used across ecommerce, retail, wholesale, and fulfilment operations, they provide dependable protection while maintaining a clean and discreet appearance throughout delivery.

Manufactured from recycled low-density polyethylene (LDPE), these mailing bags offer strong resistance against moisture, tearing, and everyday handling damage. The flexible polythene construction allows each bag to conform closely to its contents, reducing excess bulk and supporting smoother processing through postal sorting systems and courier networks.

Material and construction

With a material thickness of approximately 50-55 microns (200-220 gauge), these postage bags strike a practical balance between strength and weight. This thickness is widely used in commercial shipping environments where durability is essential without adding unnecessary postage costs. The opaque grey finish ensures contents remain hidden during transit, helping to maintain privacy and reduce the risk of interference.

Each bag is fitted with a permanent self-seal adhesive strip that enables fast and secure packing without the need for additional tape. Once sealed, the closure provides a tamper-evident finish, offering reassurance to both sender and recipient that the contents have remained protected throughout transit.

Performance in transit

These shipping bags are waterproof and help shield contents from rain, splashes, dirt, and surface moisture commonly encountered during delivery. The material retains its integrity under normal courier handling conditions, making it suitable for repeated daily dispatch in busy packing environments.

The lightweight nature of the bags helps businesses manage postage and fulfilment costs while still delivering a robust outer layer for packaged goods. This makes them a dependable solution for clothing, textiles, soft goods, accessories, printed materials, and other non-fragile items.

Best uses

• Ecommerce order fulfilment
• Retail and marketplace dispatch
• Returns, replacements, and re-shipments
• General business and warehouse packing

Storage and handling guidance

For best results, store unused parcel bags in a cool, dry area away from direct sunlight and heat sources to preserve adhesive performance. Keep stock flat and avoid placing excessive weight on top of the bags for extended periods to prevent creasing.

During packing, ensure contents are placed flat within the bag and excess air is removed before sealing. Press firmly along the adhesive strip to achieve a consistent seal across the full width of the bag.

Environmental considerations

These mailer bags are produced using recycled LDPE material and can be recycled again where facilities exist once the adhesive strip has been removed. This supports more responsible packaging practices while maintaining the performance required for commercial shipping.

For official guidance on packaging and carrier regulations in the UK, refer to the

UK Government carrier bag guidance
.

If you require alternative sizes or related packaging solutions, view our full range of
mailing bags available for UK dispatch.