Imagine a mattress designed to keep you at an optimum temperature for deep, relaxing, restorative sleep. Introducing Optimum by Sealy Posturepedic. Crafted with advanced OptiCool Gel. Infused throughout the mattress, OptiCool is an innovative gel memory foam engineered to help stabilize your body's changing temperature. Other foam mattresses tend to sleep too hot. OptiCool works by absorbing excess heat and helping to move it away from your body to create a gentle, cooling sensation. The result is Optimum. 12 times more effective at removing excess heat than standard memory foam or gel alone, for a deeper, more restful sleep. All night long. Fall asleep faster. Stay asleep longer.