Discover how premium materials, leading sleep technology, and an advanced support system align with the reimagined 13.5’’ Beautyrest Black® Series One mattress. Its firm comfort level is perfect for back and stomach sleepers who like an ultra-supportive feel with no sinking feeling. A layer of Gentle Support™ foam is easy on your body while a layer of AirCool® HD foam is designed to promote airflow for cool, pressure relief. Enjoy better sleep with Extra Firm Comfort foam and HD Firm Comfort foam, featuring superior foam layers that contour and conform to your body. Finally, the Beautyrest® Gel Memory foam adheres to the shape of your body for night-after-night of exceptional pressure relief. For the mattresses support system, Triple-Stranded Pocketed Coil® Technology offers the most advanced, lasting support for an undisturbed rest. Keep your cool with Sleep Climate™ Technology, helping transfer heat away from the body. This hypoallergenic mattress is made with eco-friendly CertiPUR-US foam that meets rigorous standards for emissions, content, performance, and durability. Mattress protector recommended. Adjustable base compatible.