While you can use it right away, it may take up to 72 hours to reach its full shape and firmness. 𝗘𝗙𝗙𝗢𝗥𝗧𝗟𝗘𝗦𝗦 𝗠𝗔𝗧𝗧𝗥𝗘𝗦𝗦 𝗖𝗔𝗥𝗘: Our foam mattress has a beautifully designed cover that is removable and machine washable, making maintenance easy and hassle-free.