The memory comfort pedic mattress x 2 are single mattresses with orthopaedic quality making them great for those with bad backsthese comfortable mattresses have a unique upper layer of high density visco elastic polymer gel which follows the outline of your body perfectly reducing tossing and turning during the night this extraordinary feature also helps improve blood flow to prevent the nerves and muscles from numbing the high quality covers have been treated with aloe vera to soothe tired