Our analysis of how well a mattress maintains its original shape, height, firmness, and side/back sleeping support after 8 years of simulated use. A measure of how much vibration is transmitted ...

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 ...