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The 9876 Super 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.
||Progressive Rate Spring
Edge and Lumbar Support
Head Corners Tethered
Linen Lock Corners
||Four layers of 1.5 oz. fiber
Made in the USA.
||Vinyl colors may vary and do not change the wave control system.
||4 year Full Warranty; 16 Year Prorated Warranty
Sterling Waterbed Warranty
||Hardside Waterbed Setup Instructions