In the box item, may require some assembly. See link for more details:
Size: 4 Inch
https://www.bedbathandbeyond.com/Home-Garden/Sleeplanner-4-inch-Tri-Fold-Memory-Foam-Mattress-Single-Gray/22881971/product.html?refccid=QACSKDOH5U5KGRKCC345YJT5JI&searchidx=0&option=38163252

