Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Does the sealed mattress fit in a mid-sized sedan's trunk?
Document: This is a great memory foam mattress, perfect for our spare bedroom for when my young brother comes to visit. I highly recommend this mattress for a child's room. It comes rolled up, without a box spring - just in case you're shocked when it arrives :) It took about half a day for it to fully come into its shape after being vacuum sealed for shipment. It is a traditional twin size and our twin sized sheets we purchased fit it perfectly and it holds a nice, firm shape.
This was a surprising purchase. I expected a huge, cumbersome mattress to struggle with but it was beautifully packaged & sealed so compactly that we moved it into our upstairs room with no trouble AT ALL. At first I was afraid the order was wrong, as I had never seen a twin sized mattress in a box!To boot, it's deliciously comfortable & I love that it's bamboo fiber. Absolutely wonderful purchase. Would definitely buy again.
I will mention, I have had this for a whole.. day. I hope it stands up to my kids sleeping and playing on it for more than a year at least. We will see. :)*Note - I bought this and the full sized one, both fit really well and I will be leaving the same review for each product.
Then lay it out and give it some time to come back into shape. The two DreamFoam beds I've owned popped into shape within a few hours. Once the mattress has filled back in from being compressed and sealed, you can then add sheets and bedding and they will fit well.And not only are these mattresses comfortable, affordable and easily shipped to your home, but they are also made in the USA too.
The first thing you notice when receiving this mattress is how compact it has been made for the shipping process by the manufacturer. It arrives rolled-up and vacuum-sealed to make it smaller and lighter for shipping. Once the box is opened and the mattress unrolled you would never have guessed that it fit into the original shipping box though!Although it is much more lightweight than most conventional mattresses of its size, there is absolutely no compromise in comfort for the user.
The mattress arrived tightly vacuum sealed and rolled but laid out flat and filled out to full size almost immediately. It is very soft but it is perfect for our 18 month old. The only very minor downside is that at 7&#34; thick most twin sheets seem to big since they're designed to fit on deeper (12&#34;) mattresses. All this means is that when you have a squirmy toddler the corners are often off the bed in the morning but it's really not a problem.
I was looking for an inexpensive new bed for my 4 y/o and this one seemed like a great fit. When it came in it was vacuum sealed and it did not look like a bed, or anything I would sleep on. But I followed the directions and let it "set" for a 48 hrs before using it. This turned out to be an amazing bed. It's very comfortable, even for an adult (I confess, I have slept on it too).
The soft topper makes the foam mattresses look more like an over-sized foam box than a mattress. Moreover, you get the moist 'foam' feel that seems to conduct heat as you sleep on it.However, the DreamFoam retains the quilted top. Because of the latter, the mattress feels more solid and put together.
I've never used a foam mattress before, so I wasn't quite sure what to expect. When I saw how small it had been compressed for shipping, I thought it wouldn't end up being that great. Happily, I was wrong. As soon as I unpacked it, it expanded to a normal-sized mattress. I have been sleeping on it now for several weeks, and it is working wonderfully.
I honestly thought I got a mattress pad when I received the box. When you see the box, you can't believe an entire mattress is in there. It's SUPER vacuum packed! We took it out and let it &#34;rise&#34; overnight and sure enough, the next day, there it was - a twin-sized mattress with a cushy top!
Answer: It's 12x12x40 in the box