Soft, knit fabric cover * 1.5 Inch, 9 ILD memory foam * Memoir mattress also available in 8 and 12 inch * Allow 48 hours for the memory bedding to expand to its proper size and shape * Meets federal flammability standard 16 CFR 1633 * ILD 9, 2-pound memory foam for ideal firmness * Relieves pressure points on your hips and shoulders while you rest