All Beautyrest Black beds offer a luxurious feel and upgraded features, and the Top of the Line K-Class Firm Pillow Top is no different. It is good for back and stomach sleepers, and provides a combination of firm padding and firmer coils. The extra layer of Nano-Coils further supports and localizes motion, as well as makes this mattress amazingly durable and resilient. This mattress is approved for use on adjustable bases, to enhance your experience in your bedroom. This mattress has layers of Gel Memory foam and RightTemp Memory Foam to keep you comfortable and cool, as well as a New BlackIce 4.0 cover that feels cool to the touch and is extremely breathable. The K-Class Firm Pillow Top has a special T3 Pocketed Coil unit, which winds three coils together in one pocket. This makes for an extra durable mattress, as well as keeps motion from moving across the bed for uninterrupted sleep. If you are in the market for a Top of the Line firm mattress, the K-Class Firm Pillow Top would be an excellent addition to your home.