Part of the Serta Perfect Sleeper collection, the Oakland Hills mattress offers advanced support and moderate firmness. Enhanced with patented PillowSoft Aire foam, it provides cushioning comfort and a unique design that promotes airflow. The addition of PillowSoft foam cradles your body for a cozy, contouring feel. Including a Custom Support Coil System, this premium model delivers superior support by adjusting to your movements with individually wrapped coils, while minimizing motion transfer between partners. Support foam combines with PillowSoft to reinforce cushioning with strong support. Extending your sleep surface, BestEdge encasement provides a foam rail to reduce roll-off. 10 Year Limited Warranty