The storage compartment that is under the bed has carpet over the part that is accessed from outside. EXCEPT for a strip down the middle.
The previous owners had a blanket in that spot, and I'm not sure if it was to fill in the depression between the carpet pieces, or to keep cold or hot air from coming through.
I know this isn't clear, but it's hard to explain. If I can figure out how to post a picture, I think that would make it easier to understand.
Ok, I'll see if this works. You can see the carpet on either side of the bed and it continues about a foot under the bed on each side. I might be able to take a picture of that tomorrow if I can lift the mattress and take a picture at the same time, a feat that could end in disaster.