Cellu-Cushion by Sealed Air
Cellu-Cushion® is Sealed Air's brand name for their archival quality, polyethylene foam product in roll form. Polyethylene is a tough, flexible thermoplastic resin, which being inert and chemically stable, meets all preservation standards. Easy to handle, cut, shape and form, these products are widely used in protective packing of fine art and artifacts for both transportation and storage. Recyclable and reusable.
Test: Oddy Test Results (link)