Dunnage Bags are used to secure a cargo and create a bulkhead during transit. These bags are great Void Fillers to prevent movement and absorb impacts in a sea container, rail car, truck, vessel, or intermodal. Dunnage Bags combine IN-LINER (also known as the bladder or balloon) which holds the compressed airtight at high-pressure levels, and OUT-LINER (the cover) to give the bags the shape, stability, and enormous strength. To ensure perfect tightness even under high pressure, all our Dunnage Bags IN-LINER are made of specially extruded polyethene (PE-mixture). At Stream Peak, the OUT-LINER of the Dunnage Bags comes in two different materials – Paper Dunnage Bags and Woven Polypropylene (PP).