The 300 Semi-Waveless Hardside Waterbed Mattress features the Progressive Rate Spring. This gives individualized support based on each sleeper's weight, adjusting to each part of your body independent of your partner. The Progressive Rate Spring also provides additional back (lumbar) support.
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||Progressive Rate Spring with Lumbar Support
Tethered Wave Control System
||Full sheets of 1.5 oz. fiber
Mid-body layers of 1.5 oz fiber
Layer Closed Cell Foam
||Black Bottom; "L" Corner Construction
Fill and Air Vent Valves
Drain Valve, US Patent 5,369,823
Linen Lock Corners, US Patent 5,005,237
Made in U.S.A
||Premium 24 mil Endura III Vinyl
(Vinyl colors may vary and do not change the wave control system.)
||Sterling Waterbed Warranty
||Hardside Waterbed Setup Instructions