INNOMAX Genesis Dual 800 Ultra Waveless Lumbar Support Waterbed Mattress, King Genesis Dual 800 Ultra Wave less Deep Fill King Waterbed Mattress for full depth rigid side box frame Wave less Performance and 20 year warranty Dual Adjustability Weightless Feel featuring near Wave less Performance and Gravity Neutral Fluid Suspension premium enhanced Mid-Body Support system Multi-Layer wave elimination system and 24 mil premium paralyzed vinyl Sculpted Body Profile sleep surface and generously overcut Low Tension design 4 Way tethered support system for Integrated Internal Component Stabilization Phase II air release valve and recessed black bottom L Seam construction Use with approved Dual Waterbed Heaters Waterbed Safety Liner Waterbed Water and Vinyl Conditioner Do Not Fill above Safety Liner