ER400 Super Waveless Softside Waterbed Mattress, with Back Support Deep Fill (8")- 2nd most waveless

The third layer of lumbar support in the ER400 makes it one of our most popular models. Most sleepers struggle with back pain on mattresses that are too soft and body aches on beds that are too firm. This super waveless model gives you extra support where you need it and responsive cradling where you don’t.

Three Lumbar Layers

As sleep system designers, we take back pain seriously. You don’t have to accept inadequate support. The ER400 will cradle the natural curvature of your spine with three lumbar layers to eliminate your pain.

Four Full-Size Layers

Four 1.5-ounce fiber layers envelop the water bladder to provide structure, stability, and dreamy comfort. You’ll feel weightless and serene atop our most popular model and wake up feeling energized.

Super Waveless

The seven layers and tethering system of the ER400 Softside Waterbed Mattress minimize motion so you can get comfortable faster, sleep through the night, and avoid disturbing your partner.

Deep Bladder 8”

Why choose a deep water bladder? You want to sleep like a weightless baby on plush, cloud-like comfort, and that requires more than six inches of water. If you’re looking for more firmness, try our mid-fill.

The Real Benefit

Unlike foam beds in a box, innerspring beds or air beds, waterbeds never get softer with time. The level of support you feel the very first night, is the same level of comfort you will get 5, 10, 15 years or beyond from now, making waterbeds right right choice for most sleepers. While most traditional beds may only last 8-10 years, our waterbeds are able to remain in use up to 30 years with proper care.