The new Serta® collection features Serta's® 805 Individually wrapped coil support system with Bestedge® Foam Encasement. This product also features Cool Twist® Gel Memory Foam. This unique foam desian features cooling gel swirled into premium memory foam. This breathable memory foam helps enhance airflow and heat dissipation for a feeling that can only be described as a cool, contouring type of comfort. Sleep comfortable knowing that this Serta® Mattress is backed by a 10 Year Limited Warranty. This group includes King mattress and 2 Twin XL foundations.