Polythene Mailers - Grey 250G
Overview
These grey opaque polythene mailers are designed for fast, reliable despatch of non-fragile items where privacy, weather resistance and efficient packing matter. Made from durable polythene film and supplied as a convenient mailing-bag format, they help protect goods from moisture and handling marks during transit while keeping contents discreet thanks to the opaque grey finish.
Commonly used by eCommerce fulfilment teams, warehouses and mailrooms, poly mailers are a practical alternative to boxes for soft goods and other items that don’t require rigid protection. They’re lightweight to help keep postage costs down, quick to pack, and easy to store in busy packing areas.
Key Features
Opaque grey film for discretion
The grey opaque material helps conceal the contents in transit, supporting customer privacy and reducing the visibility of branded or high-value items.
Durable polythene construction
Polythene mailers are built to withstand typical courier handling. The film provides a tough outer layer that resists tearing and punctures better than paper mailing bags in many day-to-day shipping environments.
Moisture-resistant outer layer
Polythene naturally repels water, helping protect items from rain splashes, damp sorting areas and general moisture exposure during delivery.
Lightweight packaging format
Compared with rigid cartons, poly mailers add minimal weight and bulk. This can be useful where shipping charges are influenced by weight or volumetric size.
Efficient packing workflow
Mailers are supplied ready to use, helping speed up pick-and-pack operations. They store flat and take up less space than boxes, making them ideal for high-throughput packing benches.
Professional presentation
A clean, uniform grey finish gives parcels a tidy, consistent look—useful for businesses shipping at scale or aiming for a neat customer unboxing experience.
Versatile for many non-fragile items
Poly mailers are widely used for clothing, textiles and other items that can tolerate flexible packaging. They’re also commonly paired with internal protection (such as tissue, bubble wrap or inner bags) when extra scuff protection is needed.
Key Features (Bullet Summary)
- Grey opaque finish helps keep contents discreet
- Durable polythene film for everyday shipping conditions
- Moisture-resistant outer layer helps protect against rain and damp
- Lightweight, space-saving alternative to boxes for suitable items
- Fast to pack and easy to store flat in fulfilment areas
- Suitable for a wide range of non-fragile goods
Typical Uses
- eCommerce orders: clothing, fashion accessories and soft goods
- Warehouse despatch for non-breakable items
- Mailrooms sending internal or external parcels
- Subscription shipments where a neat, consistent parcel appearance is preferred
- Returns processing (as an outer bag for items already protected inside)
No6 Grey Opaque Poly Mailers — Full Product Guide
Introduction
Choosing the right mailing bag is about balancing protection, speed and cost. Grey opaque poly mailers are a popular choice for businesses that ship high volumes of non-fragile items and want a packaging format that is quick to use, resistant to moisture and discreet in transit. This guide explains how poly mailers work, what to consider when selecting them, and how to get the best results in a busy packing operation.
How It Works
Poly mailers are flexible mailing bags made from polythene film. Items are placed inside the bag, the opening is closed, and the parcel is then ready for labelling and despatch. Because the packaging is flexible, it conforms to the shape of the contents, reducing wasted space compared with oversized cartons. The opaque grey film helps prevent the contents from being seen through the packaging.
For best results, match the mailer size to the item so there is enough room to insert the product comfortably without overstretching the film. If you are shipping items with corners or edges, consider adding an inner layer (such as tissue, an inner poly bag, or protective wrap) to reduce the chance of scuffing or pressure points.
Materials and Construction
These mailers are made from polythene film with an opaque grey finish. Polythene is widely used in transit packaging because it is lightweight, flexible and naturally moisture resistant. The film thickness is specified in microns (mic), which is a common way to describe the gauge of plastic packaging. A higher micron value generally indicates a thicker, more robust film.
Because product pages like this can represent multiple variants, always check the selected option for the exact pack quantity and specification shown on the page. If you are comparing mailers across suppliers, look at the film thickness, the overall dimensions (including any flap), and whether the bag is described as opaque.
Parcel Protection and Performance
Poly mailers are designed to protect against everyday transit conditions rather than heavy impacts. They help shield contents from:
• Light moisture exposure (rain splashes, damp handling)
• Surface dirt and scuffs
• General handling marks
They are best suited to items that do not require rigid protection. For fragile goods, consider using a box or adding internal cushioning and a rigid insert where appropriate.
Privacy and Security Considerations
The opaque grey film helps keep the contents out of view, which can be beneficial for customer privacy and for reducing the visibility of branded packaging or high-value items. For additional security, ensure the closure is fully sealed and apply the shipping label smoothly so it adheres well to the film.
Size and Fit Guidance
Mailers are typically specified by width and length, and may include an additional flap measurement. When selecting a size, consider:
• The item’s folded dimensions
• Whether you need room for internal protection
• How tightly you want the parcel to fit (snug vs. loose)
A snug fit can look neat and reduce movement, but avoid forcing items into a bag that is too small, as this can stress seams and increase the risk of tearing during transit.
Ideal Applications and Use Cases
Apparel and textiles
Poly mailers are widely used for clothing, uniforms, linens and other soft goods. They keep items clean and dry and are quick to pack.
Soft accessories
Items such as scarves, hats, fabric accessories and similar products often ship well in mailers, especially when placed in an inner bag for presentation.
Printed materials (where appropriate)
For non-rigid printed items that can tolerate flexible packaging, mailers can provide moisture resistance. If you need to prevent bending, add a rigid insert or choose a more rigid packaging format.
Warehouse and trade despatch
For trade customers receiving non-fragile parts or supplies, mailers can be a practical outer pack when the contents are already protected internally.
Health and Safety
As with all packaging, keep polythene mailers away from babies and young children due to suffocation risk. In a packing environment, store mailers neatly to reduce trip hazards and keep workstations clear. If using cutting tools to open incoming goods or trim labels, follow your site’s safe handling procedures.
Maintenance, Cleaning and Care
Poly mailers are supplied ready to use and do not require maintenance. Store them:
• In a clean, dry area
• Away from direct heat sources
• Flat or in a dispenser to keep packing lines organised
Keeping mailers in their original cartons until use can help prevent dust build-up and keep the packing area tidy.
Operational Tips for Faster Packing
- Standardise sizes: Choose a small range of mailer sizes that cover most of your order profiles to simplify training and reduce picking errors.
- Use inner presentation packaging: Tissue or an inner bag can improve presentation and reduce scuffing on delicate fabrics.
- Label placement: Apply labels to a smooth, flat area of the mailer for best adhesion and barcode scanning reliability.
- Batch packing: Pre-stage mailers at each bench to reduce downtime during peak periods.
Case Study (Example Workflow)
A small-to-medium online retailer shipping apparel typically needs packaging that is quick to use and keeps items clean in transit. By switching from boxes to grey opaque poly mailers for suitable orders, the packing team can reduce packing time per order and free up storage space previously used for cartons. For premium garments, the retailer can add tissue wrapping inside the mailer to maintain presentation while still benefiting from the mailer’s moisture resistance and discreet outer appearance.
Who Is It For?
- eCommerce businesses shipping clothing and other non-fragile items
- Fulfilment centres looking to improve packing speed and reduce storage space
- Warehouses and mailrooms needing a practical, moisture-resistant outer pack
- Brands that prefer discreet, opaque packaging for customer privacy
Colours / Features Available
This listing is for grey opaque polythene mailers. Product pages may include multiple variants, so check the options shown for pack quantities and any other available configurations presented on the page.
Sizes Available
Sizes and pack quantities can vary by variant on this product page. Please refer to the selected option for the exact dimensions and quantity supplied.
Need help choosing?
If you’re unsure which size or thickness best suits your products, consider the dimensions of your most common orders and whether you need room for internal protection. Selecting the right fit helps improve parcel presentation and reduces the risk of damage during transit.