The K Class Firm Pillow Top has a Comfort Scale rating of 3, which is on the firmer side of medium. In my opinion, this comfort level is almost perfect for back sleepers who enjoy a firmer feel. It provides the initial softness required to contour to your lower back, but it also offers really substantial and solid underlying support.

The T3 Pocketed Coil System is made up of three steel strands braided into one solid coil that absorbs energy, reduces motion transfer, and provides outstanding durability, support, and undisturbed sleep.

BlackICE 4.0 which incorporates natural all night cooling and SurfaceTouch Gel Memory Foam are both used in this mattress to provide an exceptionally cool sleep environment. BlackICE 4.0 features four components to ensure you have a cooler sleep surface, while SurfaceTouch Gel Memory Foam pulls heat away from the surface and dissipates it throughout the night.

The K Class is Beautyrest Blacks highest addition to the Beautyrest Black collection and includes all the great features that you will find in both the L and C Classes but also incorporates 3" of Dynamic Response memory foam and a 1" layer of Nano coils - both of these layers you will only find in K Class models.

If you're searching for a Beautyrest mattress that has it all, the Beautyrest Black K Class Firm Pillow Top is an excellent choice. This mattress has an exceptional feel, high quality components, and a support system made using the finest construction in the Beautyrest line. That's everything you need to begin enjoying deep, restful sleep.