The Military Supply is not a cut down piece of foam..........it is sized and glued and then sewn with a standard mattress cover
Swirly lines and pillow-top if called for

Here's ours after a couple months...................
We got a 54" x 76"......That makes it a "short" Full size....(I need to be able to open the bed/storage....van walls taper.....we sleep side-to-side)
We complained during our order/design "phone-call" of the existing soft memory foam mattress we were using....we hit bottom
Paulettte also needs to sit on the edge of the bed for day use......
Jim choose about 7" of his dense sleeping foam.....with 2 inches of glued soft foam for side sleeping comfort....(No pillowtop)
He would have added SOFT to both sides........... But we could never flip the mattress within the confined space
I think the mattress and FedEx shipping 50 lbs .......rolled up to 20" in diameter 54" long......across the country was about $400
Cut the wrapper and it becomes a mattress !