Sleep Master 9-Inch Comfort Spring Mattress, King Quilted poly-jacquard fiber padded cover and1.5 inches of comfort foam provide conforming support 7.5 inch base layer of independent springs assures no motion transfer from a sleeping partner, while maintaining customized spinal alignment Foam is CertiPUR-US Certified for durability, performance, and content All Sleep Master mattresses meet the requirements of 16 CFR Part 1633-Federal flammability standards Our patented compression technology allows our mattresses to be compressed, rolled and shipped in a box via FedEx