Signature Sleep Liberty 8-inch Independently Encased Coil Memory Foam Reversible Mattress,CertiPUR-US certified foam, Full Size The Signature Sleep 8 Inch Liberty Mattress is made with a 7-inch later of 15 gauge independently encased coils and a 1-inch layer of memory foam on the top and bottom. This lets the mattress contour to the curves of your body for a great nights sleep. NOTE: Please allow up to 72 hours for the mattress to fully expand and for any potential odor to dissipate. The reversibility feature of the mattress provides extra versatility enabling you to flip and rotate the mattress to even out the wear and last for years. The soft quilted mattress has an exquisite diamond pattern cover made of polyester with a wide black layer conouring all sides of the mattress Foam in this mattress is made without PBDEs, TDCPP or TCEP ("Tris") flame retardants, ozone depletes, mercury, lead and heavy metals Foam is low in VOC emissions for indoor air quality (less than 0.5 PPM). Made without phthalates regulated by the Consumer Safety Product Commission.