This is a regrettable purchase...it is advertised as a hybrid which I took to mean that it had a foam top with a standard middle and bottom. It does not. The mattress I need to throw away was such a mattress. I had that one for over a decade. That one came in a box needed to be unrolled and took a day to fully open.This one, is far far far inferior. I also think the description is deceptive.although described in the description to sound identical to my previous one is not.