The Serta Perfect Sleeper Manford Plush features Serta’s exclusive SmartSurface, which works to provide pressure relieving comfort and a balanced sleep temperature right at the sleep surface. This model features a layer of our exclusive Cool Twist Gel Memory Foam; an exclusive liquid gel-enhanced memory foam designed to help move heat away from your body, helping to promote a balanced sleep temperature. In addition, two layers of our Serta PillowSoft Foam, an extra-soft foam which gently contours the body to provide enhanced cushioning, provides additional support. Support is provided by our Free Flex Innerspring with Custom Support and Total Edge Foam Encasement. Patented and exclusive TrueSense coil design helps promote undisturbed sleep by adjusting to support you while reducing motion transfer. Our Custom Support promotes proper back support with up to 25% more support in the center third of the innerspring, where you need it most. Finally, a custom designed version of our Total Edge Foam Encasement system provides the flexibility needed to use the mattress with an adjustable foundation, while also helping to prevent roll-off or sag at the edge of the mattress.