The Saso Spine Guard 1500 is a Traditional hand-tufted mattress with luxury comfort Luxury high-grade upholstery includes wool, cotton, silk and cashmere Saso KineTechâ„¢ pocket spring system provides total body support to ensure correct spinal alignment and further enhance sleep quality Enhanced – edge support prevents edge breakdown and ensures firm yet comfortable support across the total sleep surface Sleep both sides to extend mattress life and performance – please turn regularly.