Zinus 14 Inch Gel-Infused Memory Foam Hybrid Mattress, KingSwirl Gel Memory Foam comfort, ViscoLatex Memory Foam technology, and iCoil Springs encased in foam for better edge support Foam & fiber quilted comfort cover. Core Composition: Wooden slats and Steel Frames Only the highest Quality of memory foam all foam is CertiPUR US Certified for durability, performance, and Content Smartly shipped Our patented technology allows Our mattresses to be efficiently compressed, rolled and shipped in a box conveniently