I have a sofa queen size that i wanted a better mattress. This mattress is thinner and more flimsier however firmer so that when you lay down you don't sink. I ended up using it on top of my other mattress for better support and combined them. I'm going to use it as a guest bed. Kept the box for storage since i won't be able to use both mattress's to fold away into the couch

Folds in perfectly and far more confortable than the spring mattress originally in the sofa-bed.

I ordered the Medium density mattress, but the sofa bed will not close completely.
Our soda bed is 39 years old, (yes it is good quality leather bought it when we got married)
Not sure if a newer sofa bet will handle it better. The plan is to store it in a mattress Vacuum bag until needed. I hope this helps.

I actually WANTED to write this review as both my guests and I are thrilled with this replacement mattress! I have a couch that is functionally and aesthetically fine but is 29 years old! The original spring mattress was okay for its time, but over the 29 years had lost its "spring" and padding which led to feeling the cross bars more so in the couch and pretty much unable to use the sleeper pull out. We did not use this pull out for years and then with a lot of company coming, we figured we ought to try the pull out....it was NOT until recently when we thought about using this pull out again if we could find a replacement mattress for it...and with research, we came across this one! It is well described in the write up and I measured the thickness of our old spring mattress and ordered the 4 inch thick, queen size pull out replacement mattress....I was concerned that maybe it would not fold back in....but it DOES fit perfectly and actually gives the couch a more firm seating as well. The ONLY thing, and it is not major at all, is that it is harder to pull out as the mattress is heavier than the orginal...but we have two people pull it out to make it easier....one person can do it, but we just have two of us pull it out to just be easier.
Our guests said they did NOT feel the bars and we also tested it out and it is a very comfortable mattress and really you don't feel the cross bars. I did order the foldable back board, but truly, you don't need it.....it might give a bit more support for a firmer feel, but you don't need it with this mattress unless you want to make double sure no one feels the bars or you want a firmer mattress feel!
We could NOT be more thrilled with this purchase...we now can use our 29 year old couch which hasn't been slept on in over 10 years.....with this new mattress, it gives us a lot of opportunity to have multiple guests visit and stay!

A little narrow