Refresh Rest cooling and antimicrobial technology is woven into the soft cover. Extra moisture-wicking, breathable fabric dispels heat and fights bacteria for a fresher, more comfortable sleep. 2" of therapeutic gel memory foam is the first part of the Nectar Tech Gel System. It provides perfect pressure relief and a responsive contouring feel for soft comfort. 3" of gel foam is the second part of the Nectar Tech Gel System gives responsive back support and proper spinal alignment. 8" of conventional foam ensures stabilized support and maximum motion isolation for undisturbed sleep.