Memory Foam Topper For Your Bed - Got Ta Have One!
https://mike-wiki.win/index.php?title=What_Is_A_Bed_In_A_Bag%3F
After a couple of years they have to be opened up and redone to make them soft again. In most cases the rest of the layers are only 2 or 3 lb density. The key to a great night's sleep, is a "restful" night's sleep. best