The Cassatt hybrid pillow top mattress delivers next-level comfort with layers of Indulge HD Memory Foam for pressure relief and 2” of Premium Extra Soft Gel Foam. The IntelliCoil HD support system is a one-of-a-kind innerspring design with densely packed coils that provide even more adaptive support. The stretch-knit covering with Tencel is designed to wick away moisture and keep you comfortable, while the ventilated coil system works with external air vents to increase breathability and promote cool sleep. The ultra-plush comfort level is ideal for side sleepers. This mattress is compatible with 9” and 5” Sterns and Foster foundations.