The new Optimum mattresses by Sealy Posturepedic feature "OptiCool™", which is the only gel memory foam on the market to be fused with OUTLAST®, which has been proven to be more effective for removing excess heat during the night. In fact, OUTLAST® material is used in high performance outdoor gear, undergarments, and even footwear for superior temperature regulation. OUTLAST® is twelve times more effective than standard memory foam or other gel memory foams in removing heat. The Optimum mattress also includes 1" OptiSense™ Memory Foam, which is a layer of body-hugging, contouring material which conforms to your body's unique shape and weight, creating the feeling that your mattress was made just for you. The Optimum mattress is designed to absorb motion, creating a calm, stable sleeping environment that lasts all night, each and every night.