This mattress is made from a perfect combination of memory foam and reflex foam. With an upper layer of memory foam, it is soft and pliable. It follows the outline of your body perfectly and provides the best possible support to your body's spine so you can immediately find the best possible sleeping position. Reflex foam is the core part of the mattress, it provides great support. The mattress comes complete with a removable zip cover for extra comfort. Please note: The additives used in the manufacturing of foam may give rise to a slight odor. If this should occur, please remove all packaging and store it in a well-ventilated room for 48 hours. The odor is safe and will dissipate over time.