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ER600 Edge Support, Back Support, Super Waveless Softside Waterbed Mattress, Deep Fill (8")
ER600 Edge Support, Back Support, Super Waveless Softside Waterbed Mattress, Deep Fill (8")
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Sterling Sleep Systems
ER600 Super Waveless Softside Waterbed Mattress — S-Class Series
The ER600 is a bladder only — a cover system is required to complete your softside waterbed setup. Choose from our Plush Top, Pillowtop, or Euro Top cover systems, sold separately.
ER600 Specs
- Series: S-Class
- Fill: Deep Fill — 8"
- Wave Level: Super Waveless — most waveless softside bladder
- Key Features: Progressive Rate Spring (US Patent #4905331), edge support, lumbar support, tethered wave control
- Best For: Sleepers who want maximum wave control, back support, and individualized comfort
Warranty — S-Class Series
Covers seam and valve related leaks from date of purchase:
- Years 1–5: Full replacement (excluding shipping)
- Lifetime: Pro-rated/discounted replacement (excluding shipping)
What Makes the ER600 Special
The Progressive Rate Spring adjusts to your weight and position to cushion pressure points and support your lumbar region — eliminating the droop that causes back pain. The patented edge support system keeps you in your ideal sleep position all night, while the tethered wave control system minimizes motion so you never disturb your partner.
Recommended Accessories
*Cover system, heater, fill & drain kit, and conditioner sold separately.

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Ah, a good nights sleep.
Setup was simple, even if I over filled it, (I so appreciate Mr. Gravity). After I got it adjusted it is so good to have a full nights sleep. I'd forgotten just how nice a waterbed is. Everything seems sturdy and if it needs replacement parts (if needed) should be easy to do. I appreciate your staff who helped me make the order. Helped me greatly. Thanks much!!!
Great mattress!
I was replacing a old sterling mattress that developed a leak after many years of use. Both the old and new mattress are very comfortable. I love the fact that you can replace separate pieces without having to by the entire system.
ER600 Super Waveless
Product arrived quicker than originally stated. Installation was fairly easy. Actual sleeping experience has been good overall. I would recommend this company and product to family and friends.
Happy
Awesome Love it I sleep like a baby
Awesome Results
I called because I woke up to a mattress that was leaking water. I called and told the the mattress that I had bought 15 years ago, they had 2 in stock, they were shipped and once they arrived, we were able to set them up, fill them with water and enjoy another great night of sleep. Everything about this experience, except the mattress bladder leaking, has been a great experience. I will buy from them again, when the time come, in another 15 years. Thank you for helping us get our needed good night sleep again.