This combination foam mattress is encased in a zipped and stretchable cover with zoned stitching for extra comfort. It is made up of Visco elastic memory foam, medium-density foam and 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 and guarantee that the mattress regains its natural shape. Hypoallergenic and dust mite resistant, the Memory Comfort Mattress provides the sleeper with unmatched comfort at an incredibly affordable price.Mattress may arrive with either zip cover or sewn-on cover depending on stock levels.