Enjoy a lavish rest every night with the premier offering in our most advanced collection yet, BeautyRest Black Hybrid KX-Class firm tight top mattress. This cutting edge mattress offers up to 21% more support where your body needs it the most. What's more, our new plant-based cooling technology helps provide up to 18% more cooling power to keep you comfortable as you fall asleep and all night long. This new mattress line also includes comfort, pressure-relieving and support upgrades as well as 2X more memory foam compared to BeautyRest Black Hybrid LX-Class and CX-Class models. The result: our most comfortable mattress ever. A luxurious layer with silk, alpaca and cashmere provides unmatched comfort and breathability while Self-Response Latex ensures individualized support for different parts of your body. Lastly, 2000 micro-coils add an additional layer to our Premier Support System and provide precise conformability for a first-class sleep experience. 10 Year Non-Prorated Warranty