The Sealy® Response™ Performance™ Curtain Call mattress features SealyCool™ Gel Foam. It's made with cushioning foam with gel added for additional flexible, durable support. Last, but not least, this mattress features DuraFlex™ Edge System, a high density, flexible coil border surrounding the mattress for better edge support. You can use the full surface of the mattress and it provides a solid seating surface. Get ready to enjoy a full night's sleep filled with comfort and support!