So our NTU p’up came to us without mattresses of any sort in that I purchased it “mid-remodel”. More info other parts of the forum but I thought I’d share my mini review of the Lucid 5” Foam Mattress we picked up from Amazon Came to us with 2 day free shipping, Prime member nicely boxed, vacuum packaged; They even included a little box cutter that safely removes the vacuum seal from the mattress. As soon as I laid it on the bunk it immediately started to fill out. We opted to order a Full, even though our bunkends are both Queen. I just didn’t want to cut anything and my DW isn’t a bit concerned with the gap near the end of the bunk of about 3”; It comes in a zippered cover so if you choose so you could easily buy the larger size, cut it down and zip it back up easy enough. All in all, I think it’s a great buy and a good fit. It was on sale for $129 and I also found it for the same at WalMart.com if you’re interested. I will be sleeping on it in 2 weeks, so I’ll update the thread then, but with the anti-fatigue mat under it that I picked up from HF, if felt really comfortable when I laid down on it. Btw, 4” of Firm Foam and 1” top layer of Memory Foam. Hope this helps.