The Serta Avant Garde collection has been designed with style and sophistication in mind, bringing you the art of sleep in a stunningly luxurious super firm mattress. With soft, natural silk the Santarelli features Dual Core, a hybrid design combining spring and foam technology with 5 zones of support combined with a layer of mini pocket springs to eliminate partner disturbance. In addition, the Memory Foam Plus comfort layer supports your body's pressure points while KulKote, a heat regulating layer, absorbs, stores and releases thermal energy to give you a more consistent sleep climate.   The range is endorsed by the Australian Physiotherapy Association (APA) and comes with a 90 Day Comfort Guarantee. *Mattress base sold separatley