Indulge in first-class restorative sleep night after night with the modern design of the Beautyrest Black line. With the help from the new plant-based cooling technology, the collection provides more cooling power to keep you comfortable as you fall asleep and throughout the night. As the premier offering in the Black lineup, the K-Class features an upgrade of 2K Nano Coils to create a robust support system and enhanced conformability. Extra memory foam provides even more pressure relief. A layer of firm memory foam gives this mattress a more firm feel of support.