The Sealy® Dreamlife collection provides layers of comfortable, conforming support to help you stay asleep all night and wake up refreshed. The Sealy® Dreamlife Medium Mattress is 8" medium foam feel and includes sealycomfort™ gel memory foam that conforms to your body to provide pressure relief and a personalized sleep experience. Underneath that layer is sealycomfort™ gel transition foam, which enhances the overall comfort of the mattress and adds long-lasting durability. 10-Year Limited Manufacturer’s Warranty.