3.3 Cloud9 King 3 Inch 100% Visco Elastic Memory Foam Mattress Topper Assembly required. Three separate layers of foam and removable expandable mattress pad cover. Two 4" Customizable Layers of Soft Sleeper Superior Support. One Firm and the other Medium Firm. 4" layer of Soft Sleeper 5.5 Visco Elastic Memory Foam, and a removable, washable, Expand-A-Cover This luxurious visco memory foam material reacts to your body temperature reducing pressure points. 100 NIGHT SLEEP TRIAL! 10 Year Soft Sleeper Manufacturer Limited Warranty! Visco Elastic Memory Foam