Spacious and precisely engineered, this Serta Perfect Sleeper Cascade Bluff hybrid mattress uses pocketed coil technology for broad, even support and EverCool Supreme Hd Memory Foam for a cooling, contouring comfort layer. CoolFeel technology works alongside CoolTwist Gel Foam to regulate warmth and promote airflow throughout the night. Adjustable base compatibility ensures versatile, personalized sleep positioning.