I bought two 30x80 mattresses.
"I bought two 30x80 mattresses. I had to wait 11 days before opening the vacuum sealed packaging, so one of the mattresses didn't quite expand like the other after 3 days like I was hoping. It feels a little softer than the other. But it's ok, they're both still very comfortable and work well for the couches I'm building. So I will advise to open the vacuum seal ASAP and just find a place to store them if need be."