Home  |   About Us  |   Contact Us  |   Blog  |  
Waterbed Mattresses
Softside Waterbeds
Waterbed Heaters
Waterbed Supplies
Waterbed Linens
Waterbed Padded Rails
633 E Main Street 
Next to CVS
Anoka, MN 55303
763-323-7533 or 877-256-1696

Home > Waterbed Mattresses > Softside Mattresses > Softside 6.25" Deep

Sterling Z6621 Mid Fill Softside Waveless Mattress

Part Number Z6621
review 0 Review(s)
Sterling Z6621 Mid Fill Softside Waveless Mattress
Internal Control Components
Review this item Review this item
Your Price:  
Choose Options
Twin (39" X 75")
Full (54" X 75")
Queen (60" X 84")
King (78" X 80")
Cal King (72" X 84")
  • Semi waveless with lumbar support
  • 6.25" fill depth water mattresses
  • Premium 20 mil Endura III Vinyl, "Bali Blue"
  • 2 full size layers of 1.5 oz. Fiber
  • 2 Layers of Lumbar Support
  • Tethered Wave Control System
  • Made in U.S.A.
  • Vinyl colors may vary, does not change the wave control system
  • 4 year Full Warranty; 16 Year Prorated Warranty
Sterling Endura III? Waterbed PVC

When manufacturing waterbeds, material quality determines product excellence. Endura III is formulated with the finest resins and plasticizers available for waterbeds.

Sterling Endura III waterbed PVC was developed exclusively by Sterling Sleep Systems to meet all recognized performance and health standards established for waterbed vinyl in the US and in the Europe.

Endura III significantly exceeds the California Bureau of home furnishings performance standards. Over the last 20 years we learned that low temperature performance is an important indicator of overall material formulation stability, not just a measure of how well the product will survive shipping during winter months. The California Bureau of Home Furnishings standards requires waterbed material to pass a -20 F test, we engineered Endura III to exceed -35 degree F. We are not aware of any other waterbed material that equals this standard currently.