Abstract: A liner for a shipping container that surrounds cargo and packaging therefore to protect the cargo and packaging from moisture and contamination. The liner includes a bag that can be expanded to line the interior of a shipping container. The bag has an end within an opening, through which cargo can be loaded. In certain embodiments, a skirt is configured to seal the bag to the open end of the container to create an enclosure between the exterior of the bag and the interior of the container. Air can be drawn through an opening in the skirt to create a vacuum thereby expanding the bag to line the walls of the container. A cover is configured to seal the bag opening shut after cargo has been loaded in the bag. A valve enables air to be vacuumed from the interior of the bag to collapse the bag around the cargo and packaging.