24 Mil Molded Vinyl Wood Frame Waterbed Mattress.
90% to 95% Waveless (2 to 3 seconds of motion)
The Waterbed Doctor’s comment: The 400 RXP is one our extra premium waterbed mattress. This Mattress offers more back support than the older waterbed mattresses. Using the best fiber in the industry, there are 4 layers head to foot, and 3 layers in the middle section providing extra back support. This Mattress is Considered a Soft Feel with Medium Firm Back Support.

*Waterbed Doctor Comfort Guarantee* 
FREE EXTENDED 20 YEAR WARRANTY!

• 24 Mil Molded Premium Vinyl
• Built-In Thermometer
• 4 Layers of Fiber Head to Foot plus 3 Extra Layers for Better Back Support
• Anchored in 4 corners to prevent Fiber from shifting
• 7 Year Free Replacement Warranty. Best in The Industry
• Extended 20 Year Warranty
• IN STOCK and ready for FREE SHIPPING

20 YEAR EXTENDED WARRANTY!

• 1 to 7 years free replacement for any heat sealed seam failure.
• 8 to 15 years customer pays 70% of the most recent suggested retail price.
• 16 to 20 years customer pays 80% of the most recent suggested retail price.
• 5 year unconditional guarantee.