When the package showed up at my door, it looked like it contained merely a small set of golf clubs.  It turns out that the mattress is vacuum sealed in plastic, and when you cut the plastic it inflates like a water raft.  It was actually kind of fun to watch.  It took a few hours for it to get to the size I expected, and it had a new mattress odor, but in the end, it is a fine mattress.  I don't know that I would recommend it for an adult for every day use, but it is way better than a cheap innerspring mattress.  Very pleased with purchase.