Polythene Mailers - Grey 250G
Short description
These grey opaque polythene mailers are designed for fast, reliable despatch of non-fragile items. The opaque film helps conceal contents in transit, while the lightweight construction keeps postage costs down. This listing covers a range of pack quantities for the same style of mailer, making it easy to choose the quantity that suits your operation.
Key Features
Opaque grey film for privacy
The grey, non-see-through material helps prevent the contents being visible during handling and delivery—ideal for clothing, accessories and other items where discretion matters.
Lightweight polythene construction
Polythene mailers are a popular choice for eCommerce fulfilment because they add minimal weight compared with boxes, helping you control shipping costs while still providing a protective outer layer.
Mailing-bag format for quick packing
A simple “insert and seal” workflow speeds up packing benches and reduces the need for additional void fill for soft goods.
Everyday durability for transit
The film is intended to protect items from scuffs and surface moisture encountered during normal courier networks and postal handling.
Consistent sizing for fulfilment workflows
The mailer format is suited to standard pick/pack processes, helping you maintain consistent presentation and packing speed across orders.
- Grey opaque polythene mailer for discreet shipping
- Lightweight to help reduce postage costs
- Fast pack-out for busy fulfilment environments
- Protective outer layer for non-fragile goods
- Multiple pack options available on the same product page
Typical Uses
- Clothing (t-shirts, hoodies, trousers, dresses)
- Soft accessories (scarves, hats, bags)
- Textiles and fabric items
- Printed materials that don’t require rigid protection
- General eCommerce despatch where a box is unnecessary
No1 Grey Opaque Poly Mailers — Full Product Guide
Grey opaque poly mailers are a fulfilment staple for businesses that ship high volumes of soft goods. They are designed to be simple to use, quick to store, and efficient to ship. This guide explains what these mailers are best suited for, how to choose the right option, and how to get the most from them in day-to-day packing.
How It Works
Poly mailers are flexible mailing bags made from polythene film. You place the item inside the bag, remove excess air (where appropriate), and seal the opening. Once sealed, the mailer forms a close-fitting outer layer around the product, helping protect it from handling marks and light moisture exposure during transit.
Because the bag is flexible, it can conform to the shape of the contents—making it particularly effective for garments and other compressible items. This can reduce dimensional weight compared with shipping the same item in a box.
Materials and Construction
This product is a grey opaque polythene mailer with a stated thickness of 55 microns. Micron thickness is commonly used to indicate film gauge; in practical terms, it helps you compare mailers for robustness and feel. A thicker film generally offers increased resistance to tearing and punctures, while still remaining lightweight.
The opaque grey finish is chosen for discretion and a clean, professional appearance. Opaque mailers are widely used for consumer deliveries because they help prevent the contents being identified at a glance.
Choosing the Right Mailer (Sizing Guidance)
When selecting a poly mailer, aim for a size that allows the item to slide in easily without forcing, while still leaving enough room to close and seal the opening neatly. For clothing, consider the folded dimensions rather than the garment’s worn size.
- For single garments: choose a mailer that fits the folded item with a little clearance.
- For multi-item orders: allow extra space for bulk and seams; avoid overstuffing which can stress the film.
- For boxed items: poly mailers are generally best for soft goods; if you must ship a small carton, ensure corners won’t puncture the film.
Tip: If you’re unsure, test-pack your most common order types and record the best-fitting mailer option for each SKU group. This speeds up training and reduces packing errors.
Protection and Transit Performance
Poly mailers are intended to provide an outer protective layer for items that do not require rigid impact protection. They help guard against:
- Surface scuffs and abrasion during handling
- Light moisture exposure (for example, damp conditions during delivery)
- General dirt and marks picked up in transit
If your products are fragile, easily creased, or require crush protection, consider using a box or adding internal protection before placing the item into a mailer.
Health and Safety
As with many packaging products, keep polythene mailers away from babies and young children due to suffocation risk. Store packs in a dry area away from heat sources and sharp objects that could damage the film. In a warehouse setting, keep packing stations tidy to reduce the chance of snagging the mailer on cutters, staples, or exposed metal edges.
Ideal Applications and Use Cases
These mailers are commonly used by:
- Online retailers shipping apparel and soft goods
- Marketplaces and resellers needing quick, consistent packing
- Fulfilment and 3PL operations where speed and storage efficiency matter
- Small businesses looking for a professional, discreet shipping solution
Maintenance, Cleaning and Care
Poly mailers are designed for single-use shipping. Keep unused mailers clean and flat in their original packaging until needed. Avoid storing them where they may be exposed to prolonged direct sunlight or excessive heat, which can affect plastics over time.
Packing Bench Best Practices
- Prepare labels first: print and stage shipping labels to reduce handling time.
- Remove excess air: gently press out air before sealing to keep parcels compact.
- Use a consistent fold: standardise garment folding to improve fit and presentation.
- Double-check addresses: apply labels to a smooth area to reduce wrinkles and scanning issues.
Case Study (Typical Workflow Example)
Scenario: A clothing retailer ships daily orders containing one to three garments. Switching from small cartons to grey opaque poly mailers reduces packing time because staff no longer need to assemble boxes or add void fill for most orders. Parcels become lighter and more compact, improving storage at the packing bench and simplifying courier collection.
Outcome: Faster pack-out, consistent presentation, and improved discretion for customers receiving branded or personal items.
Who Is It For?
- Businesses shipping non-fragile items that don’t need rigid protection
- Teams that want quick packing with minimal materials
- Sellers who value privacy and a clean, neutral parcel appearance
- Operations aiming to reduce shipping weight compared with boxes
Colours / Features Available
This product is listed as a grey opaque polythene mailer. The opaque finish is a key feature for discreet shipping and professional presentation.
Sizes Available
This product page represents a specific mailer format and may include multiple purchase options (such as different pack quantities). Select the option that matches your required quantity for your packing operation.
Product title on this page: No1 9x12.5+2 - 220g Grey Opaque PWN Poly Mailers (225x318+50mm - 55mic)
Category: Bags / Mailing Bags / Polythene Mailers - Grey
Film thickness stated: 55 microns