Quilted Jacquard cover 7'-15 gauge independently encased coil springs; Meets Federal Flammability Standard CFR1633 Mattress is shipped compressed, rolled and vacuum sealed The Contour Mattress by Signature Sleep satisfies the need for contoured support of the vertebrae. This 8 inch mattress conforms to the curves of the body creating an equal weight distribution and relieving pressure along the body. The 15 gauge independently encased coils eliminate motion disturbance to ensure an uninterrupted night's sleep. Multiple layers of polyester and foam add to this mattress' unparalleled quality and supreme comfort.