Premium Memory foam is a very popular and luxurious mattress layer to aid in comfort. The buzz around memory foam is well justified, it is incredibly comfortable and makes it feel like you are sleeping on a cloud. Standard caveats apply however, memory foam can make you hot and this may present a problem for those that do find themselves getting warm through the night. For those with this issue, take a look at a Latex mattress. For everyone else though, you cannot beat it.