The Beautyrest Greenwood firm mattress provides support and comfort, combining 800 Density Pocketed Coil innerspring technology with multiple foam support and comfort layers. Its design of individually wrapped coils contours to your body yet remains supportive where you need it. The 850 Density Pocketed Coil technology in the support core lets the individually wrapped coils shift with you as you move slightly in your sleep, yet moving independently to reduce partner disturbance. And the top layer of the mattress is infused with a natural fiber that helps wick away heat and moisture. Find out if the Beautyrest Greenwood firm mattress is right for you by trying it out in your local Mattress Firm store, or by purchasing online to take advantage of our 120-night sleep guarantee.Dimensions: Twin: 39 W x 75 D Twin XL: 39 W x 80 D Full: 54 W x 75 D Queen: 60 W x 80 D King: 76 W x 80 D Cal King: 72 W x 84 D.BR Warranty.Comfort Level: 2.