Comfort, support, and temperature management are all part of the design with the Beautyrest Hartfield 11.5 luxury firm mattress, available now from Mattress Firm. A great choice for any sleeping position, the Hartfield offers pressure point relief and back support for each unique shape. The Hartfield mattress utilizes 850 Density Pocketed Coil technology as its supportive core, with the individually wrapped coils shifting with you as you sleep to keep you properly supported. The mattresss luxury firm feel is designed to promote freedom of movement and prevent the sinking feeling that causes many to replace their mattress. Cooling technology is built in with the SurfaceCool fiber cover and 2 AirCool foam top comfort layer which are designed to help wick away heat and maintain breathability.In addition, the individually wrapped coils mean low motion transfer, which minimizes partner disturbance for restorative sleep. The reviews below for the Beautyrest Hartfield mattress say it all, you can purchase in store or online and take advantage of our 120-night sleep trial.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.