Sleep Master 11-Inch Premium Spring Mattress, King Quilted poly-jacquard fiber padded cover and 1.5 inches of comfort foam provide conforming support 1.5 inch layer of High Density Foam above the Coil Springs provides additional support 7.5 inch base layer of independent Coil Springs assures no motion transfer from a sleeping partner, while maintaining customized spinal alignment Foam is CertiPUR-US Certified for durability, performance, and content Our patented compression technology allows our mattresses to be compressed, rolled and shipped in a box via FedEx