The ultra-thick Classic Brands Mercer 12 in. Hybrid Cool Gel Memory Foam and Innerspring Mattress Blend the support of a wrapped steel coil innerspring with the conforming response of memory foam. Its multiple layers include a breathable open-cell memory foam plus additional layers of comfort foam that work with the support layer to give you a deep, Comfortable sleeping experience. Individually wrapped coils encased in separate pockets contour to your body. This memory foam and the innerspring mattress come in a quilted knit cover with a handsome corded edge and breathable knit sides. Available in several sizes.