This IS NOT 4 inches of memory foam is spite of it's Name "Serta Rejuvenator 4-inch Memory Foam Mattress Topper " It is really about 3 inches of regular foam, glued to an inch of memory foam. And the glue job is nearly worthless. Just around the edges and it isn't staying glued down. And the glue smells really bad as well. If something says "4 inch Memory Foam" does it make sense that you'd have to read the fine print to see that it ISN'T 4 inches of memory foam. I will never buy anything from SERTA again and Overstock should take steps not to allow the products they sell to be misrepresented.