How long can the mattress stay in the box? Customer Service 01 December 2017 16:47 Updated The Leesa mattress can stay in the box up to 30 days from the date the order was placed. Related articles How do you set up the Leesa Mattress? Is the Leesa mattress available on Amazon? When will I receive my Leesa Mattress? How much is shipping? Do you ship internationally? Comments 0 comments Article is closed for comments.