The Beautyrest Black K-Class firm pillowtop mattress offers up to 21% more support where your body needs it most: the center third. With help from our new plant-based cooling technology, the collection provides up to 18% more cooling power to keep you comfortable as you fall asleep and throughout the night. Our most comfortable mattress ever, the K-Class also features comfort, pressure-relieving, and support upgrades including 10X more memory foam compared to Beautyrest Black L- and C-Class models. A luxurious layer of silk, alpaca and cashmere provides unmatched comfort and breathability while Self-ResponseT Latex ensures individualized areas of entire-body support. Lastly, 2000 micro-coils add an additional layer to our Premier Support System for precise conformability. You'll wake up feeling invigorated and ready to take on the day. 10 Year Non-Prorated Warranty