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.

This affordable, ultra-comfortable hybrid mattress offers more support and longevity than a traditional memory foam bed. But ...

Even innerspring mattresses can do without one ... as adding a box spring could void your warranty. Tempur-Pedic makes some of the best memory foam mattresses in the world, and using a box spring ...

Look no further than the humble, traditional innerspring mattress. While it may not be as common as a foam or hybrid bed in box, an innerspring mattress is a must-have for hot sleepers or anyone ...

"When everyone had a plain innerspring mattress and box spring ... including our top picks from brands like Saatva, Tempur-Pedic and Bear — are one-sided. Sometimes called "no turn mattresses ...