Widely used and relatively cheap sacks but also includes sacks that have an insecticide treatment within their fabric. There are 3 common types of open weave sacks:
Hard waring sacks made of jute fibre, more expensive than polypropylene to buy but longer lasting.
Made from woven polypropylene strands. Relatively cheap and may be coated so that they have a non-slip surface, so taller stacks can be built. The polypropylene may include a UV stabiliser, this promotes a long life.
| Insecticide treated polypropylene sacks:
An open weave polypropylene sack, with non-slip surface and UV stabilisation, that includes an insecticide treatment within the weave. This treatment kills insects that make contact with the sack surface.