For moisture sensitive products

They will also prevent flavour loss, odour transfer, ingress of ultra violet light, mould and fungi growth and colour deterioration.

Benefits include superior tear and puncture resistance, and the ability to store outdoors if required. The sacks are hermetically sealed, eliminating stitching or gluing.  

They can also be supplied with a one-way de-gassing valve which allows the removal of excess air to improve pallet stability and also allows any build-up of gases that may be released by the packaged product to vent, thus equalising the internal and external pressure and preventing bags from bursting.