Make every night a night of comfort and luxury with the Beautyrest Black® Hybrid LX-Class medium tight top mattress. As a part of our most advanced collection yet, this LX-Class sleep system offers up to 21% more support where your body needs it the most.* What's more, 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 all night long.** In addition, our patented memory foams unlock immediate pressure relief and personalized support. These innovative features are paired with an all-new modern design and hybrid construction to create a first-class sleep experience that will have you feeling invigorated and ready to take on your day. *in the center-third of mattress, exact percentage varies by model. **vs. Harmony Lux Collection, which cools for the first 20 minutes only.