DualCool Technology: An antimicrobial performance layer that works to keep your mattress fresh and cool while moving heat and moisture away. AirCool Foam: Get cool, comfortable sleep with AirCool Foam which has a channeled design that allows airflow through the mattress. Comfort Foams: High quality comfort foams in different levels of plushness used in various constructions to create comfort preferences. Gel Memory Foam Lumbar Support: Get support right where you need it most with Gel Memory Foam Lumbar Support. 900 Series Beautyrest Pocketed Coil Technology: Provides flexible support precisely where it is needed and isolates motion between two sleepers. Top:Polyester