- NEW UPGRADED FOAM MATERIALS 1' New improved Ocean-Blue cooling gel memory foam + 4' high-rebound(also high-density) support memory foam. Our premium version Marktol mattress Offer you 3 BETTER experience. - BETTER 1 Ocean-Blue cooling gel composition BETTER draws heat away from the body and keeps you cool during sleep. - BETTER 2 Body-contouring memory foam BETTER reduces pressure points and properly aligns the spine, molds to your every curve to cradle your body, providing you with restful sleep without any uncomfortable sinking, sagging, or trouble turning in bed, ensuring a comfortable sleep experience. - BETTER 3 High-rebound support foam BETTER fully expand in 48 hours. Even after vacuum packed and into a box.