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.

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.

The support base is made of foam, whereas the Sealy Posturepedic Hybrid mattress has a pocketed coil base. The GravityLux’s cover has a type of pillow top design that the Sealy Posturepedic ...