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Customer Pick

Mattress Helper® Under-Mattress Cushioned Mattress Support - King

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Overview & Details

Mattress Helper® Under-Mattress Cushioned Mattress Support  
No one likes a sagging mattress — or having to spend their hard-earned cash on a new one. These Mattress Helpers are designed to go between your mattress and box spring and reinforce those soft areas for added support. Firm but flexible, they provide plenty of comfort to help you get more restful sleep. So forget the stress of mattress shopping, and settle in for the better slumber you deserve. 

Good to Know
  • Mattress Helper is not a medical nor an orthopedic device.
  • If you experience any pain or discomfort as a result of using Mattress Helper, you should immediately discontinue use and seek the medical attention of your doctor or physician.
  • 2 people are needed to install this item: 1 person to lift the mattress and 1 person to put the Mattress Helper in place.
  • Use caution when lifting any mattress to install Mattress Helper to avoid back injury.
  • Mattress Helper is not a topper and is intended to go underneath your mattress only.
Measurements: Approx. 50"L x 31"W x 2" Deep
Material Composition: High density polyurethane foam with non-slip additive finish
Care: Spot clean only
Country of Origin: USA


Under-the-mattress support
  • Designed to be placed between the mattress and the box spring
  • Helps reinforce the soft area where your mattress sags and raises it for added support 
  • Cushioned support helps provide comfort for restful sleep
  • Can help create the feel of a medium-firm feeling 
  • Helps your bed look and feel better
  • Can be moved anywhere under the mattress to adjust for your personal comfort and support

Made of durable high density polyurethane foam
  • Allows mattress to continue to flex and move

Patented spacing design
  • Allows for a comfortable and firmer mattress for a more restful night's sleep

Non-slip fabric covering
  • Keeps the Mattress Helper in place between the mattress and box spring
  • Helps prevent shifting under the mattress


Mattress Helper® Under-Mattress Cushioned Mattress Support - King

75 reviews 4.4 out of 5
5 Star
72% 54
4 Star
12% 9
3 Star
5.33% 4
2 Star
5.33% 4
1 Star
5.33% 4
Would recommend to a friend
  • I am surprised

    It works. I was skeptical but was suffering back and hip issues from the sagging middle of our bed. The mattress is only about 6 years old and was not cheap so I am a little reluctant to buy a brand new mattress. I saw all the positive reviews on this and I took the chance it might work, if it doesn't I can always return. It was easy to install, although I had my son help but the first night we had it, my husband and I felt a tremendous difference in support. The divot in the middle of the bed is gone. Quick tip, buy the king size for a queen mattress. It will cover more surface area.

    junerockstar29, MD
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  • Great buy

    What a difference it made on my bed. No more sunken mattress, made it more comfortable to go to sleep or even just watch tv in bed.

    Pjrn, CA
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  • the dent is gone

    Just ,married our mattress so bad w big dent in center this product gives us time to save for a newmattress

    lorak59, MD
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  • Im guessing it works

    Well, I gave it a 5 because it does seem like it works, but I'm not sure. I think I need more time. It definitely bumped up the bed mattress a long will it last? Not sure. Did I align it in the mattress right? Could it be that simple? Why so expensive for two pieces of foam? I'm on the fence, but will give it the benefit of the doubt. Seems like I should have a better opinion but I am really not sure.

    Salita635, FL
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  • Oh, How Happy It Has Made Me.......

    Even though my bed is kind-sized, I purchased a twin Under-Mattress Cushioned Mattress.My caregiver and I placed it between the top and bottom mattresses. She immediately noticed how high it became.Since my stroke in 2008, I normally crawled to almost the middle of the bed and this action made a dent in the bed. To sleep on either side of my bodyis immediate pain.After the very first night with my new Under-Mattress, I noticed I had no pain at all. Who would believe that a sag in my mattress was robbing me of sleep and comfort???I am so grateful for this mattress I could cry. This was the first decent night's sleep in 9 years. YAHOO!

    MzSeville, MI
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