I was very skeptical when ordering this without seeing it online even more skeptical when I took it out of the box it was completely compressed inside of the package, however,  that all changed when you open the package and it starts to immediately expand ,within a few hours it had fully expanded my daughter slept on it it has been on it ever sense says it’s one of the most comfortable mattress is she has slept on,  good buy will probably buy another for the guestroom