The Sleep Master 12" Euro Box Top Pocketed Spring Mattress offers a wonderful night's sleep. The euro box top is quilted with super soft foam and fiber padding above the 7.5" base layer of independent iCoil pocketed springs(12 gauge). The outstanding support of Sleep Master spring mattresses comes from the hundreds of supple, independent-operating springs, icoils, that provide the support your body needs. Since each spring works independently virtually every inch of your body gets a customized level of support, whether you sleep on your back, side or stomach. Each spring flexes as your body moves during sleep to provide the perfect amount of support. There is virtually no "motion transfer" from one part of the mattress to another. This means less disruptive sleep among sleep partners. The Sleep Master spring mattresses contain a layer of memory foam which is CertiPur-US certified, flexible, polyurethane foam and offer a limited 5 year warranty. Compression technology allows for FedEx/UPS delivery. Meets all FR standards. Please allow a full 48 hours for it to fully expand.