Elevate your sleep to a luxurious reward night after night. As a part of our most advanced collection yet, the Beautyrest Black L-Class 13.5" Medium Mattress offers up to 21% more support where your body needs it the most.* 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. Sleep soundly knowing your mattress has antimicrobial protection to keep your mattress fresh and clean from odor causing bacteria.*** These innovative features are paired with an all-new modern design to create a first-class sleep experience that will leave you feeling invigorated to take on your day. *in the center-third of mattress, exact percentage varies by model **vs. Harmony Lux Collection for the first 20 minutes *** this product does not protect users against bacteria, viruses, germs or other disease organisms