Enjoy a deeper, more restorative sleep on Sealy's Calhoun II Firm Mattress Collection. A layer of SealyCool™ Air Gel Foam, an upgrade over SealyCool™ Gel Foam, helps to create a cool, breathable sleep surface while offering extra cushioning, providing for an exceptionally comfortable feel. Balancing this is the firm support offered by a layer of SealySupport™ Gel Foam Medium and a Response™ Open Coil System.