California King Comfort Supreme Waveless Waterbed Mattress 4 Layer Wave Reduction System=Approximately 99% Motion Reduction Patented Memory Hi-Loft Thermal-bonded Fiber--5 Year Full, 12 Year Prorated Warranty Thermavinyl Heat Resistant Black Bottom, Air-Cushioned Reinforced 4-layer Corners for durability 4-Point Memory Stretch Tether System, Regal Foam Waveless Top Comfort Layer Highest Quality Heavy Duty Vinyl, Vacuum Molded Impression Top