I searched on line for a reasonably priced replacement mattress.  I read the reviews for this one & ordered it.  It was delivered in 2 days.  It is exactly as specified. 2"memory type foam + 2 1/2 " sturdy foam.  Nicely covered cloth top with swirl design.  I also ordered the mattress bord to cover the metal rods.  My son & grandchildren found it comfortable.  

Pros: Exceeded my expectations for quality.  Plumped up to 4 1/2" quickly.