Layered plush softness for all-night relaxation defines this Serta Perfect Sleeper Cascade Range plush pillow-top mattress set, bolstered by the Q4 Support System to distribute weight evenly and prevent sagging over time. CushionGel Hd Foam draws heat away from the body, while PillowSoft Aire foam cushions pressure points. CoolFeel technology keeps the surface consistently cool for deeper, more restorative rest.