Perfect Sleeper Luminous Sleep offers enhanced pressure-relieving comfort thanks to three layers of exclusive Serta foams, HexCloud Gel Memory Foam, WonderCloud Memory Foam, BubbleCloud Foam, and the 1000 Edition Custom Support Coil System. This top-of-the-line mattress delivers the ultimate comfort experience with the addition of an anti-microbial, cool-to-the-touch sleep surface to help you get the restorative sleep you’ve been missing. An extra thick layer of WonderCloud Memory Foam creates the thick profile for the pillow top. BubbleCloud Foam and Serta Support Foam provide a medium comfort level in this mattress.