This memory comfort pedic mattress is a single mattress with orthopaedic quality making it great for those with bad backsthis comfortable mattress has 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 cover has been treated with aloe vera to soothe tired skin and de