300G - 400G Polythene Bags
Clear Heavy-Duty Poly Bags — Product Overview
These clear polythene bags are a heavy-duty option designed for protecting and presenting products while keeping contents visible. The listing covers a popular heavy-gauge range (76–102µ) and this product is specified at 89µ thickness, making it well suited to applications where extra strength and puncture resistance are important. The bag size is shown on the product as 18 x 31 in (also listed as 457 x 787mm) and the page notes 300g–400g polythene bags, indicating a typical use band for items in that weight range.
Key Features
Clear film for easy identification
The transparent material helps with quick visual checks, stock picking, and presentation—useful in warehouses, retail backrooms, and dispatch environments.
Heavy-duty thickness (89µ)
At 89 microns, these bags sit in the heavy-gauge category shown on the page (76–102µ). This thickness is commonly chosen when you need improved durability compared with lighter poly bags.
Large-format bag size
The product is listed as 18 x 31 inches (457 x 787mm), providing a generous internal space for larger items, grouped components, or bulky soft goods.
General-purpose protective packaging
Clear poly bags are widely used to protect goods from dust and handling marks during storage, internal movement, and shipping preparation.
- Clear heavy-duty poly bag for visibility and presentation
- 89µ thickness (heavy range shown as 76–102µ)
- Size listed: 18 x 31 in / 457 x 787mm
- Use band noted on page: 300g–400g polythene bags
Typical Uses
- Protecting products from dust and light handling during storage
- Grouping parts, components, or kits for picking and packing
- Packaging larger items where a clear outer bag is preferred
- General warehouse, fulfilment, and retail backroom bagging
Clear Heavy-Duty Poly Bags — Full Product Guide
Choosing the right polythene bag is usually about balancing visibility, strength, and practicality for your workflow. This product is a clear, heavy-gauge poly bag specified at 89µ, positioned within the heavy category shown on the Sapphire page (76–102µ). Below is a practical guide to help you decide if this is the right option for your packing bench, warehouse, or production area.
How It Works
Poly bags provide a simple protective barrier around goods. Items are placed inside the bag to help reduce exposure to dust and to minimise scuffs from handling. Because the film is clear, the contents remain visible for identification and checking without opening the bag.
Materials and Construction
The product is listed as a clear poly bag with a specified thickness of 89µ. Thickness is a key indicator of robustness: heavier micron films generally offer improved resistance to tearing and puncturing compared with lighter films. The Sapphire category shown on the page places this item in the Heavy (76–102µ) range.
Size and Fit Guidance
The bag size is shown as 18 x 31 inches and also as 457 x 787mm. When selecting a bag, allow enough width for the product’s widest point and enough length for the product plus any fold-over or closure method you plan to use. If you are bagging multiple items together, consider the combined bulk and whether corners or sharp edges could stress the film.
Weight / Use Band (as noted on the page)
The description references 300g–400g polythene bags and the title includes 350g. Treat this as a practical indicator of typical usage rather than a strict limit—real-world suitability depends on the shape of the item, how it is handled, and whether there are sharp edges.
Health and Safety
As with many packaging bags, keep away from babies and children to avoid suffocation risk. If using in a workplace, ensure staff follow site procedures for safe handling and disposal of packaging materials.
Ideal Applications and Use Cases
- Warehousing & fulfilment: keeping items clean and grouped for picking
- Retail & e-commerce prep: clear presentation and quick SKU identification
- Manufacturing & assembly: kitting components and protecting finished goods
- General storage: reducing dust on stored items
Maintenance, Cleaning and Care
These bags are typically used as a packaging consumable. Store unused bags in a clean, dry area to keep them free from dust and to maintain clarity. Avoid placing heavy loads on top of stored bags to reduce creasing and deformation.
Case Study (Example Workflow)
A typical dispatch bench workflow might involve placing a product into a clear heavy-gauge bag to keep it clean and easy to identify, then grouping bagged items into an outer carton for shipping. The clear film helps reduce picking errors because the contents can be checked at a glance before sealing the carton.
Who is it for?
- Teams that want clear visibility of contents during storage and picking
- Operations that need a heavier-gauge bag for more demanding handling
- Businesses packing larger items that benefit from a large-format bag
Colours / Features Available
This listing is for clear poly bags. (Other colours or closure types are not stated on the Sapphire page for this product.)
Sizes Available
This product page represents a specific size shown as 18 x 31 in / 457 x 787mm. If you need alternative sizes, check the wider polythene bag range on Sapphire.