ABOUT THE COLLECTION:The Royal Sovereign collection represents timeless elegance and refined comfort. Made using natural materials like luxury wool and alpaca fibers, it features patented Kluft Standard and a Belgian Jacquard Damask silk cover with Bloomingdale's exclusive BioCeramics™ technology for the ultimate sleep experience. View all mattresses in the Kluft Signature collection. QUILTING LAYER:The mattress features over 40 patented, handcrafted outer tufts that allow the mattress to breathe while holding silk, wool and alpaca fibers in place. This quilting technique improves support while minimizing deep body impressions. Materials: Imported Jacquard damask, silk/wool fibers, Hi-loft FR fibers, Plush quilting foam, true stretch cotton backing COMFORT LAYER:Clean, breathable graphite infused TerraPur® latex relieves pressure and provides cooling consistent comfort. Materials: Double layer of Firm graphite infused Celsion TerraPur latex, 2 layers of firm HD foam SUPPORT DETAILS:Latex performance is enhanced with a sculpted foam layer that provides adapted comfort based on the sleeper's shape & weight. Materials: Support flex tempered 15 gauge individually wrapped coils, high density foam encased perimeter support system BOX SPRING:Cushioned wood platform covered with luxury Belgian Jacquard Damask, non-skid top and a dust cover on the bottom. Materials: Wood & Belgian Jacquard Damask