Polythene Mailers - Grey 250G
Short description
These grey opaque polythene mailers are designed for fast, secure dispatch of non-fragile items. Made from durable 55 micron film with an integral flap, they help protect goods from moisture, dirt and handling marks while keeping contents discreet in transit.
Key bullet points
- Opaque grey film for privacy: helps conceal contents during shipping and handling.
- 55 micron thickness: a robust everyday gauge for mailing soft goods and boxed items that don’t require rigid protection.
- Integral flap: extra flap length supports secure closure and efficient packing.
- Lightweight protection: adds minimal weight compared with cartons while providing a barrier against moisture and dust.
- Space-efficient storage: supplied flat to reduce storage space and speed up pick-and-pack.
Typical uses
- Clothing, textiles and soft accessories
- Documents and printed materials (where rigid protection is not required)
- Small boxed items and retail goods
- Returns and exchanges packaging
- E-commerce fulfilment and mail order dispatch
No0 6x9+2 - 220g Grey Opaque PWN Poly Mailers — Full Product Guide
Grey opaque poly mailers are a staple for busy packing benches because they combine speed, discretion and practical protection in one lightweight format. This listing covers Sapphire’s grey opaque polythene mailers made from 55 micron film with an integrated flap. They are commonly used across e-commerce, retail fulfilment and warehouse dispatch operations where you want a clean, professional outer pack that helps shield items from the elements and everyday handling.
How it works
Poly mailers are simple by design: place the item inside the bag, fold the flap over and seal. The polythene film forms a protective outer layer that helps resist moisture and surface dirt during transit. The opaque grey colour helps keep the contents private, which can be useful for consumer deliveries and general mail order where discretion is preferred.
Because the bags are supplied flat, they’re quick to grab, open and fill—ideal for high-throughput packing lines. For best results, choose a mailer size that allows the contents to sit comfortably without excessive stretching, and ensure the flap is fully closed and pressed down along the seal line.
Materials and construction
Film type: Polythene (poly) mailing bag film.
Colour and opacity: Grey opaque outer film designed to reduce visibility of the contents.
Thickness: 55 micron film, a widely used gauge that balances durability with low weight.
Flap: Integrated flap length (shown in the size format as “+ flap”) to support secure closure and tidy sealing.
Poly mailers are intended as a flexible outer pack. They are best suited to items that can tolerate normal courier handling and do not require rigid edge protection. If you are shipping fragile goods, consider pairing with internal cushioning or using a rigid mailer/carton.
Floor type compatibility
These mailers are compatible with typical warehouse and packing environments:
- Bench packing: easy to open and fill on standard packing benches.
- Racking and pick faces: flat-packed format stores neatly in bins and shelving.
- Dispatch cages and totes: lightweight and flexible for consolidation.
If you use automated bagging or sealing equipment, confirm the required bag format and sealing method for your specific machinery and workflow.
Health and safety
- Handling: Keep cutting tools away from the film when opening cartons to avoid accidental damage to the bags.
- Choking hazard: As with all plastic bags, keep away from babies and children.
- Workplace safety: Maintain clear packing areas to reduce trip hazards from loose packaging materials.
Ideal applications and use cases
Grey opaque poly mailers are commonly chosen when you want a clean, professional-looking outer pack that’s quick to use and helps protect against moisture and scuffs.
- E-commerce fulfilment: ideal for clothing, soft goods and accessories where speed and presentation matter.
- Retail dispatch: a discreet outer pack for customer deliveries.
- Warehouse shipping: useful for consolidating items and protecting them from dust and light moisture.
- Returns processing: convenient for sending replacement items or providing a bag for returns.
Maintenance, cleaning and care
Poly mailers are single-use shipping consumables and do not require maintenance. To keep them in best condition before use:
- Store dry and clean: keep cartons off damp floors and away from direct moisture.
- Avoid heat and sunlight: prolonged exposure to high heat or direct sunlight can affect plastic film over time.
- Keep flat: store in the original carton to prevent creasing and to maintain easy dispensing.
Case study (example workflow)
Scenario: A small online retailer dispatches daily orders of apparel and accessories. They need packaging that is quick to pack, keeps items clean in transit, and looks consistent across shipments.
Approach: Items are folded, optionally placed in an inner protective sleeve, then inserted into a grey opaque poly mailer. The flap is sealed and a shipping label is applied to the outer surface.
Outcome: The retailer benefits from faster packing compared with cartons for soft goods, reduced storage space for packaging materials, and improved discretion for customer deliveries.
Who is it for?
- Online sellers shipping soft goods and non-fragile items
- Retailers and warehouses needing a fast, lightweight dispatch option
- Operations that value discreet packaging and consistent presentation
- Businesses looking to reduce packaging volume compared with boxes (where appropriate)
Colours / features available
This product is part of Sapphire’s grey polythene mailer range. Grey opaque film is commonly selected for its discreet appearance and reduced visibility of contents. If you require alternative colours or specialist features, browse the wider mailer range to match your packing requirements.
Sizes available
Sapphire’s polythene mailer listings often cover multiple size options within a range. Select the size that best suits your products and packing method, allowing enough room for the contents and a secure closure without overstretching the film. If you are unsure which size is best, consider the packed dimensions of your item (including any inner packaging) and choose the nearest suitable mailer size with comfortable clearance.
Need help choosing?
If you tell us what you’re shipping (item type and packed dimensions), we can help you select the most suitable mailer size and thickness for your dispatch process.