Not just Sorta Comfortable, Serta Comfortable. Serta makes the official mattress of the National Sleep Foundation. With a new HyperTouch Comfort System designed with a combination of specialized foam, fibers, and premium stretch-knit fabric, you’ll feel completely cradled. The 825 Edition Custom Support Coil System provides ultimate pressure point relief and minimizes motion transfer for the restorative sleep you’ve been dreaming of. A layer of Cool Twist Gel Memory Foam helps relieve heat and pressure. The plush top of the Brookton Plush gives you the soft comfort you want and the pressure-relieving support you need.