The Foam Density in a Foam Mattresses ….. What’s the difference?    If you’re looking for a NEW foam mattress, one of the things you’ll need to consider is the Mattress Density you require!   When it comes to density it’s important to remember that higher numbers don’t necessarily...   The Foam Density in a Foam Mattresses ….. What’s the difference?    If you’re looking for a NEW foam mattress, one of the things you’ll need to consider is the Mattress Density you require!   When it comes to density it’s important to remember that higher numbers don’t necessarily...