The ultra fine latex and high density memory foam used in this mattress supports your spine while you sleep and moulds to your bodys contours as you sleep by responding to your body heatthe memorypedic bliss mattress provides natural ventilation and will keep you cool throughout the night as well as providing you with a great nights sleep this mattress is hypoallergenic and has a handy anti dustmite dry cleanable cover making it practical as well as ultra comfortable