Reach new levels of luxurious rest night after night with our most advanced collection yet. The Beautyrest Black® C-Class firm mattress offers up to 21% more support where your body needs it the most: the center third of the mattress.* 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.** The C-Class also includes comfort and pressure-relieving upgrades for up to 18% more overall pressure relief than Beautyrest Black® L-Class models. A comfort layer made with silk, alpaca and cashmere provides unmatched comfort and breathability while Self-Response™ Latex ensures individualized support for different parts of your body. These innovative features are paired with an all-new modern design to create a first-class sleep experience that will leave you feeling invigorated and ready to take on your day. *Exact percentage varies by model. **vs. the Harmony Lux Collection, which cools for the first 20 minutes only.