Polythene Mailers - Grey 250G
No7 Grey Opaque PWN Poly Mailers — Secure, Professional Mailing Bags for High-Volume Dispatch
These No7 grey opaque PWN poly mailers are designed for fast, reliable despatch where privacy, durability and a clean presentation matter. Made from tough polythene film and supplied in a convenient pack quantity, they’re a practical choice for busy packing benches handling clothing, soft goods and other non-fragile items. The grey opaque finish helps conceal contents in transit, while the PWN (Printed Warning Notice) print provides clear handling guidance for carriers and recipients.
Because this is a configurable product listing, sizes and pack quantities may vary by option. Please select the variant that matches your required dimensions and quantity.
Key Features
Opaque grey film for discretion
The grey opaque material helps reduce visibility of the contents, supporting a more secure and professional delivery experience.
PWN (Printed Warning Notice) print
The PWN marking provides a clear, consistent warning/handling message on the outer bag, helping communicate that the package should not be left unattended or in an insecure location.
Strong polythene construction
Polythene mailers are widely used for their tear resistance and ability to withstand the knocks and scuffs of parcel networks.
Lightweight packaging
Compared with boxes, poly mailers add minimal weight, helping keep shipping costs under control while still providing robust outer protection for suitable items.
Fast packing workflow
Mailers are quick to open, load and seal, making them ideal for high-throughput fulfilment environments.
- Discreet: grey opaque finish helps conceal contents
- Communicative: PWN print provides clear handling guidance
- Durable: tough polythene film suited to parcel networks
- Efficient: quick to pack and seal for busy dispatch
- Cost-aware: lightweight alternative to cartons for suitable products
Typical Uses
- Clothing and fashion fulfilment (t-shirts, hoodies, trousers, accessories)
- Soft goods and textiles (non-fragile items)
- E-commerce orders where discreet packaging is preferred
- Returns and exchanges (when a robust outer bag is required)
- Warehouse-to-store transfers for baggable items
No7 Grey Opaque PWN Poly Mailers — Full Product Guide
Poly mailers are a staple of modern fulfilment because they combine speed, protection and a tidy presentation. This No7 grey opaque PWN mailer option is intended for businesses that ship a high volume of parcels and want a consistent, professional outer pack that supports privacy and clear handling communication.
How It Works
Poly mailers are designed to act as the outer protective layer for items that don’t require rigid protection. You place the product inside the bag, remove excess air for a neat finish, and seal the closure. The sealed mailer then protects against scuffs and light moisture exposure during transit, while the opaque film helps keep the contents out of view.
For best results, choose a size that allows the item to sit comfortably without over-stretching the film. Overfilling can increase the risk of seam stress and may compromise the seal.
Materials and Construction
These mailers are made from polythene film and specified by thickness (microns). Thickness is a useful indicator of robustness: thicker films generally provide improved puncture and tear resistance for demanding distribution environments. The grey opaque finish is achieved through pigmentation of the film, which also contributes to reduced transparency.
The PWN print is applied to the outer surface to provide a consistent warning/handling message. This can be helpful for delivery networks and for recipients, particularly where parcels should not be left in insecure locations.
Floor Type Compatibility
Not applicable — this product is packaging rather than a flooring or surface product.
Health and Safety
- Keep away from children: plastic bags can present a suffocation hazard.
- Use appropriate cutting tools carefully: if opening with blades, cut away from the body and contents.
- Workstation safety: keep packing areas clear to reduce trip hazards and improve packing speed.
Ideal Applications and Use Cases
E-commerce fulfilment
Ideal for shipping apparel and other non-fragile items where a lightweight, durable outer pack is preferred.
Discreet deliveries
The opaque grey film helps reduce visibility of the contents, supporting privacy for the recipient.
High-volume dispatch
Poly mailers are quick to handle and store, helping streamline pick/pack operations.
Returns processing
Useful for returns where a robust outer bag is needed to protect items on the way back to your facility.
Maintenance, Cleaning and Care
Poly mailers are single-use packaging in most fulfilment workflows. Store unused mailers in a clean, dry area away from direct sunlight and heat sources to help maintain film performance. Keep packs sealed or covered to prevent dust and debris from contaminating the adhesive area (where applicable) and to maintain a tidy packing station.
Case Study (Example Workflow)
A clothing retailer dispatching daily orders can standardise on a small set of mailer sizes. Pickers place folded garments into the appropriate grey opaque PWN mailer, remove excess air for a neat parcel profile, seal, label and despatch. The opaque finish supports a consistent brand-neutral presentation, while the PWN print provides clear handling guidance on every parcel. Standardising the outer packaging can reduce packing time, simplify training and improve consistency across shifts.
Who is it for?
- Online retailers shipping clothing and other baggable items
- 3PLs and fulfilment centres needing fast packing materials
- Warehouses looking to reduce carton usage for suitable products
- Businesses that prefer discreet, opaque outer packaging
Colours / Features Available
- Colour: Grey (opaque)
- Print: PWN (Printed Warning Notice)
- Material: Polythene mailer film
Sizes Available
This listing may include multiple size and pack options. Please select your preferred variant from the options shown on the page. Where a size is shown with an additional flap/lip measurement, this indicates the closure flap used for sealing.
Need help choosing?
If you’re unsure which size is best, choose a mailer that allows your product to fit without stretching the film, with enough allowance for the closure flap to seal cleanly. For bulky soft goods, consider sizing up to reduce stress on seams and improve presentation.