Abstract: The present invention relates to sealed gas materials composed at least mainly of bio-based raw materials. There are four 2024/165793 main types of materials under the invention: 1) sealed gas bubble sheet, 2) sealed gas pillows, 3) sealed gas foam sheets, and 4) sealed gas foam 3D objects. The materials can be used for protection, insulation, and/or construction. Typically, the materials are prepared by mixing one or more cellulose-based raw materials into an aqueous solution or dispersion from which a structure is formed, and inserting gas into the solution or dispersion, to form the structures with gas sealed within the material.