This combination foam mattress is encased in a zipped & stretchable cover with zoned stitching for extra comfort. It is made up of viscious elastic memory foam, medium density foam & high density foam. The memory foam layers relieve pressure on that vital point of the body by contouring to the sleeper's shape whilst the two density foams provide support & guarantee that the mattress regains it's natural shape. Hypoallergenic & dustmite resistant, the Memory Comfort Mattress provides the sleeper with unmatched comfort at an incredibly affordable price.