The Simmons Beautyrest Black Cristabel Firm Pillowtop Mattress is rated 40 on the Comfort Scale. Advanced Pocketed Coil Technology, provides you with exceptional back support so you are well supported and relaxing in firm support. Ventilated AirCool BeautyEdge keeps air moving, taking heat away from your body. Dynamic Response Memory Foam works in conjunction with Contour Support Nanocoils to give you enhanced pressure relief and contoured support that will form to fit your every curve. While GelTouch Foam gives the sleep surfaces a soothing, yet supportive feel. The exclusive Black High Definition Luxury Cover is luxuriously soft and knit with Surface Cool Plus Fiber, these vertically integrated fibers will wick heat away from you letting you sleep soundly, all night long.