Costco sells them too. I have the full mattress at home and it's the best thing I've ever slept on.

 

we are a team running a volvo 780 with the table "we never use it" but the cushions are hard as hell so we went to wal-mart and got a twin size 6" menory foam mattress "one side is soft the other is firm" not quite right so back to wal-mart for a 1 1/2" menory foam mattress topper.

know i can sleep when she is driving even on I-10 in Louisiana. :shock:
and when idling you can't even feel the engine run. it's great for us :lol:

 

we run team and bought a 3" memory foam at sams club. We bought a king size and folded it over, for 6" of padding on top of the crappy truck mattress. It is amazingly comfortable, especially through La and east Texas.