Polythene Mailers - Grey 250G
Overview
Sapphire No.0 White Co-Ex Opaque Poly Mailers are lightweight polythene mailing bags designed for dispatching goods securely while keeping contents concealed in transit. This listing covers Sapphire poly mailers in the No.0 size range (commonly referenced as 175 x 230 mm) manufactured in white co-extruded (Co-Ex) opaque film at 55 micron thickness. They are intended for everyday e-commerce fulfilment, mail order, and general despatch where a clean, professional outer presentation and privacy are important.
Because these mailers are supplied as a configurable product with variants, the exact pack quantity and pricing may vary by option selected. Please refer to the variant selector on this page for the available pack sizes.
Key Features
Opaque white Co-Ex film:
The white co-extruded construction provides an opaque finish that helps prevent the contents being seen through the bag, supporting privacy for clothing, accessories, and other non-fragile items.
55 micron thickness:
A 55µ film specification offers a practical balance of strength and flexibility for routine shipping, helping the bag resist tearing during handling while remaining lightweight to keep postage costs down.
Lightweight mailing solution:
Polythene mailers add minimal weight compared with boxes, making them a popular choice for high-volume despatch operations.
Clean, professional presentation:
The white outer surface gives a neat appearance for customer deliveries and can be suitable for applying shipping labels clearly.
Space-efficient storage:
Supplied flat, poly mailers store compactly and are quick to pick and pack—useful for busy packing benches and warehouse environments.
Key Features (Bullet Summary)
- White Co-Ex opaque polythene mailer
- No.0 size range (commonly referenced as 175 x 230 mm)
- 55 micron (55µ) film thickness
- Lightweight alternative to cartons for suitable items
- Designed for fast packing and efficient storage
Typical Uses
- Clothing and soft goods despatch (t-shirts, tops, leggings, scarves)
- Accessories and non-fragile items that do not require rigid protection
- Mail order fulfilment and e-commerce shipping
- Internal transfers between sites where privacy and cleanliness matter
No.0 White Co-Ex Opaque Poly Mailers — Full Product Guide
Poly mailers are a staple packaging format for businesses that ship a high volume of parcels and want a simple, cost-effective outer pack. The Sapphire No.0 white Co-Ex opaque mailer is designed to provide a tidy outer appearance and concealment of contents, while keeping packing time low. Below is a practical guide to help you choose, use, and get the best performance from this style of mailing bag.
How It Works
Poly mailers are used as an outer shipping envelope. You place the item(s) inside, remove any release liner (where applicable), seal the closure, and apply a shipping label. The opaque film helps reduce visibility of the contents, and the flexible construction allows the bag to conform around soft items to reduce wasted space.
Materials and Construction
Co-Ex (co-extruded) polythene film:
Co-extrusion refers to producing a film from multiple layers of polymer during manufacture. In practical terms for mailers, this can help deliver a consistent film with good handling characteristics and an opaque finish. The white outer appearance supports a clean presentation and can help labels stand out.
Opaque finish:
An opaque mailer is commonly chosen when you want to reduce the chance of the contents being identified during transit. This is particularly useful for apparel and consumer goods where discretion is valued.
55 micron thickness:
Micron (µ) is a measure of film thickness. A 55µ mailer is commonly used for general despatch where you want a robust feel without moving into very heavy-duty film. If you are shipping sharp-edged products or items that could puncture film, consider additional internal protection (such as wrapping, inner bags, or a rigid insert) depending on your risk profile.
Floor Type Compatibility
These mailers are suitable for use in typical packing environments including warehouse packing benches, retail back rooms, and home-office fulfilment setups. Because they are supplied flat, they can be stored in drawers, shelving, or pick faces. For best workflow, keep the selected size and pack quantity close to your label printer and tape/void-fill station (if used) to reduce handling time.
Health and Safety
- Keep away from children: Plastic bags can present a suffocation hazard.
- Manual handling: When packing high volumes, set up your bench height and workflow to reduce repetitive strain.
- Cutting tools: If opening returned mailers with blades, use safety cutters and cut away from the body.
Ideal Applications and Use Cases
E-commerce apparel fulfilment:
For clothing and other soft goods, a poly mailer is often the fastest way to pack while keeping parcels lightweight. The opaque white film helps maintain a consistent brand presentation across shipments.
Subscription and repeat despatch:
If you ship similar items repeatedly, standardising on a mailer size can simplify stock control and speed up training for new packing staff.
Returns and exchanges:
Many businesses include a returns label or paperwork inside the parcel. A neat, opaque outer mailer can help keep documents protected and reduce visibility of the contents.
Maintenance, Cleaning and Care
Poly mailers are typically single-use outer packs. Store unused mailers in a clean, dry area away from direct sunlight and excessive heat to help maintain film performance. Keep packs sealed or covered to prevent dust build-up, especially if you apply labels and want strong adhesion.
Case Study (Practical Example)
Scenario: A small online clothing retailer dispatches daily orders and wants to reduce packing time while keeping parcels discreet.
Approach: They standardise on an opaque white Co-Ex poly mailer for most apparel orders, keeping the mailers at the packing bench with labels pre-printed in batches.
Outcome: Packing becomes faster and more consistent, parcels remain lightweight, and the opaque finish helps keep the contents private during carrier handling.
Who Is It For?
- Online retailers shipping soft goods and non-fragile items
- Warehouses and fulfilment operations seeking a lightweight outer pack
- Small businesses and home-based sellers wanting a professional-looking mailer
- Teams that value privacy of contents in transit
Colours / Features Available
This product is specified as a white, opaque Co-Ex poly mailer. If you require alternative colours or transparency levels for different workflows (e.g., clear for internal picking visibility), check related Sapphire mailer ranges.
Sizes Available
This listing is for the No.0 size range, commonly referenced as 175 x 230 mm. As this is a configurable product page, please use the variant options on this page for the available pack quantities and any other selectable options.