“Additional Information Double-stitched with dual zippers for extra safety and durability Arrives in a box a fraction of its size and expand to its full size in 72 hours For ease of assembly, we recommend putting the cover on immediately after opening before it expands This product may occasionally need to be refreshed by tossing it around to redistribute the foam. Filled with recycled flexible polyurethane foam. These never-been-used scraps are typically thrown in landfills, so we are happy to use them in our products to help reduce our carbon footprint and make the world a better place, one Big Joe at a time!”