frequently asked questions

Q: Do your bags deteriorate in UV light?

A: No, both duraweb® and our window material are designed to be UV stable. Durability in strong sunlight is supported by both field and laboratory testing.

Q: How much light & what frequencies pass through the material?

A: 30-40% of visible light across all frequencies is transmitted through the duraweb®, compared to 10-20% transmitted through widely-used paper bag materials and as little as 5% for Tyvek-style pollination bags

Q: What is the duraweld® process?

A: We use the duraweld® process to manufacture our bags. By fusing the material together, a strong continuous bond is created, which is pollen-proof (unlike stitching, which creates holes) and does not come undone when wet (unlike many glues). It makes the seal very strong. We test the strength every hour to ensure that the duraweld® on our bags meets our exacting standards.

Q: What is the average pore size of duraweb®?

A: The average pore size is approximately 10 microns

Q: What happens to duraweb® in the rain?

A: duraweb® does not weaken or lose its shape when wet. It has been developed to be weather resistant and suited for all climates. Water and water vapour can pass through the material. A minimal amount of water is absorbed into the material so it takes on little extra weight, and helps to avoid humidity build up.

Q: What is duraweb®?

A: duraweb® is a specially designed and manufactured material formulated especially by PBS International for use in plant breeding.

Q: What is duratrace®?

A: duratrace® is our method of ensuring that our bags conform to the highest possible standard, time after time. We do this through a series of regular checks against our exacting standards for material characteristics and manufacturing standards. Our duratrace® processes also allow for complete traceability of each batch of products.

Q: How do PBS pollination bags affect the microclimate inside the bag?

A: Any bag will create a slightly different microclimate inside compared with the external environment. Air, light and moisture can pass through duraweb®, the environment inside the bag as kept natural as possible.

Q: Can your bags be reused?

A: Many customers do reuse our bags over several seasons. They can be sterilised or autoclaved. We do not recommend this for abrasive or spiky plants such as oil palm.

Q: How do I seal my pollination bag?

A: A lot depends upon the plant. Cable ties, rubber bands, paperclips and many other methods have been adopted. See the “how to use our products” section for more information.

Q: Do you have a distributor in my country?

A: We give a personal service and deal directly with customers all over the world however we also have distributors in Indonesia, Malaysia, Colombia and Ecuador – please contact us via for more details.

Q: Do you hold stock?

A: Generally we manufacture and ship to order, our distributors in Indonesia and Malaysia however do hold some stock.

Q: What are your lead times?

A: Our manufacturing lead time is 6 weeks dependant on quantity and the shipping method. Let us know when you need them and we can plan appropriately allowing for shipping time. For enquiries please email us and we will be happy to help.

Q: Can you make me a customised product?

A: Yes and we love a challenge so if you’d like to send us your specification we would love to put a quote together for you.

Q: Do you sell cellophane, glassine or micro perforated bags?

A: No, we only sell bags made from duraweb®. However for situations where durability and breathability are less important we recommend Focus Packaging for glassine and plastic crossing bags.

Q: How and where do you ship the products?

A: We ship via courier either by land, air or sea and we ship to all countries around the world.

Q: What crops do you provide pollination bags for?

A: We provide for a wide variety of crops from coconuts in Vanuatu to Arctic Poppies in Canada. Please get in touch and we’re sure we can provide a bag or tent to suit your crop.