Why not have it all - Cooling Memory Foam AND a Premium Wrapped Coil System. This Serta Perfect Sleeper Hybrid Mattress has a high coil count Wrapped Coil System that adjusts to your body providing unmatched support. Atop this they've added the exclusive HexCloud™ Gel Memory Foam to relieve painful pressure points and adds coolness to the mattress. Additional pressure relieving, cooling Memory Foam found in a layer of Cool Twist® Gel Memory Foam. A CoolFeel™ Fabric helps you sleep cool and comfortable all night. This Plush Pillow Top mattress is ideal for a Side or back sleeper.