Polythene Mailers - Blue
No05 Tourer Blue Opaque Poly Mailers are designed for fast, reliable despatch of non-fragile goods where privacy and presentation matter. Made from opaque blue polythene, these mailing bags help conceal contents in transit while providing a lightweight, space-efficient alternative to boxes for many eCommerce and fulfilment operations. This listing covers the No05 format in the Tourer range, supplied in trade-friendly pack quantities.
These mailers are specified as 55 micron (55mu) and are shown on Sapphire Packaging as No05 483 x 737 mm (19 x 29) with a 50 mm lip. They are listed under Polythene Mailers - Blue and are available as a pack of 250 (with pricing displayed per pack and per 1000 on the Sapphire product data page).
Key Features
Opaque blue film for discretion
The blue opaque material helps reduce visibility of the contents, supporting customer privacy and reducing the temptation for opportunistic interference during transit.
55 micron specification
A 55mu construction offers a practical balance of durability and weight for everyday shipping of soft goods and other non-breakable items.
Generous opening lip
The 50 mm lip provides extra material at the opening to support easier loading and more secure closure when sealing for shipment.
Trade pack quantity
Supplied as a box/pack of 250, ideal for busy packing benches and consistent replenishment cycles.
Simple, space-saving storage
Flat-packed mailers take up minimal shelf space compared with cartons, helping keep packing areas organised.
- Product: No05 Tourer Blue Opaque Poly Mailers
- Category: Bags / Mailing Bags / Polythene Mailers - Blue
- Thickness: 55 micron (55mu)
- Size shown: 483 x 737 mm (19 x 29)
- Lip shown: 50 mm
- Pack quantity shown: 250
Typical Uses
- Mailing clothing, textiles and other soft goods
- Despatching bagged items where a rigid box is not required
- Warehouse fulfilment and eCommerce shipping operations
- Returns processing (sending replacement mailers with outbound orders)
No05 Tourer Blue Opaque Poly Mailers — Full Product Guide
Choosing the right polythene mailer is about matching the bag format and film specification to your packing workflow and the type of goods you ship. The No05 Tourer blue opaque mailer is a practical option for businesses that want a discreet, lightweight outer pack for everyday despatch. Below is a detailed guide to help you decide if this mailer format is right for your operation.
How It Works
Polythene mailers are intended to act as an outer shipping layer for items that do not need rigid protection. You place the product inside the mailer, close and seal the opening, then apply your shipping label to the outside. The opaque blue film helps keep the contents out of view while the lightweight construction helps keep postage costs under control compared with heavier packaging formats.
Materials and Construction
This Tourer mailer is specified at 55 micron thickness. Micron (mu) is a common way to describe film thickness; in practical terms, it helps indicate the balance between tear resistance and flexibility. The mailer is made from blue opaque polythene film and is supplied flat for efficient storage and quick access at the packing bench.
Size and Fit Guidance
Sapphire’s product data shows this No05 format as 483 x 737 mm (19 x 29) with a 50 mm lip. When selecting a mailer, allow room for the item’s thickness and any internal packaging (such as an inner bag, tissue, or paperwork). If you are shipping multiple items in one parcel, consider how the combined thickness affects the fit and closure.
Closure and Sealing
The 50 mm lip provides additional material at the opening to support sealing. For best results, ensure the opening area is clean and dry before sealing, remove excess air where appropriate, and press firmly along the seal line to achieve consistent adhesion. In high-throughput environments, standardising your sealing method helps reduce rework and improves parcel presentation.
Floor Type Compatibility (Packing Environment)
These mailers are well suited to typical packing environments including warehouse benches, dispatch tables, and retail backrooms. Because they are lightweight and flexible, they can be handled easily in tight spaces and stored in pick-face locations. If your operation uses automated bagging or conveyor systems, confirm compatibility with your specific equipment and handling requirements.
Health and Safety
As with all plastic packaging, keep mailers away from heat sources and store them in a clean, dry area. Ensure staff follow safe manual handling practices when lifting cartons of mailers and maintain tidy packing stations to reduce slip/trip hazards from loose packaging materials. If you include mailers in customer shipments for returns, consider adding appropriate consumer safety messaging in your own documentation where required.
Ideal Applications and Use Cases
- Apparel fulfilment: Ideal for clothing and textiles where a discreet outer pack is preferred.
- Soft goods shipping: Suitable for items that can tolerate normal courier handling without rigid protection.
- Multi-channel retail: Useful for both eCommerce orders and store-to-customer despatch.
- Returns and exchanges: Handy for including a spare mailer for customer returns.
Maintenance, Cleaning and Care
Polythene mailers are supplied ready to use and do not require maintenance. To keep packing quality consistent, store cartons away from direct sunlight and excessive heat, and avoid crushing or placing heavy loads on top of stored mailers which can cause creasing and slow down packing. Rotate stock so older cartons are used first.
Case Study (Workflow Example)
Scenario: A small-to-medium eCommerce operation shipping apparel daily wants to improve packing speed and reduce storage space used by cartons.
- Before: Orders shipped in boxes for most items, leading to higher material use and slower packing.
- Change: Switch suitable orders (non-fragile soft goods) to opaque polythene mailers.
- Result: Faster pack-out, reduced storage footprint, and improved discretion for customer deliveries.
This example illustrates a common reason businesses adopt mailers: they streamline despatch for appropriate product types while maintaining a neat, professional parcel appearance.
Who Is It For?
- eCommerce brands shipping clothing and soft goods
- 3PLs and fulfilment centres needing consistent, trade-ready supplies
- Retailers offering home delivery from store stock
- Operations that value discreet packaging and efficient storage
Colours / Features Available
This listing is for blue opaque polythene mailers in the Tourer range. If you require alternative colours or different opacity levels, browse the wider mailer range to match your brand presentation and operational needs.
Sizes Available
This product page represents the No05 format, shown as 483 x 737 mm with a 50 mm lip. Sapphire’s mailer ranges are typically offered in multiple numbered sizes; if you are unsure which size best suits your products, compare your packed item dimensions (including thickness) against the stated mailer size and lip allowance.
Need help choosing?
If you share what you’re shipping (item type and approximate packed dimensions), we can help you select the most suitable mailer size and film specification for your workflow.