Indicates the main composition of the mattress, such as innerspring or memory foam. Some so-called "hybrid" innersprings include one or more levels of foam on top.

Dr. Lees says firm latex mattresses are among the firmest available, followed by extra firm innerspring mattresses; while the ...

Since it's a hybrid with a top layer of memory foam, it's slightly too plush for someone who prefers an extra firm innerspring mattress.

But while innerspring mattresses were once the norm ... but it also comes in plush and firm options, as well as an extra-firm ...

Typically, innerspring mattresses that contain steel coils will be more firm and supportive than all-foam mattresses, though this is by no means a universal decree. The amount and type of foam in ...

McKenzie, a Certified Sleep Science Coach and proclaimed mattress expert, has been writing sleep content in the wellness space for over four years. After earning her certification from the Spencer ...