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Customer Pick

Mattress Helper® Under-Mattress Cushioned Mattress Support - King

or 4 FlexPays of $24.99
S&H: $7.95

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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

69 reviews 4.4 out of 5
5 Star
72.46% 50
4 Star
10.14% 7
3 Star
5.8% 4
2 Star
5.8% 4
1 Star
5.8% 4
Would recommend to a friend
  • 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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  • very pleased

    Very happy with this product I no longer wake up with backache

    gizmoclo, PA
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  • It Works

    Thought I would be buying a new mattress but with these inserts I'll get a long more time before I do now. Very happy with how they work. One thing is thought that it makes my bed look lumpy as the inserts do not go all the way down the mattress. The support is good though and I now wake up with no more aches and pains.

    peperoch, NY
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  • Wonderful Sleep

    I am having better sleep since starting to use these supports. My back does not hurt in the morning and my mattress does not sag from laying on it all night. I feel better energized in the morning. Amazing how such a simple structure can do so much!

    mickidarla8, MD
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  • ...don't need a new mattress now!

    Our mattress is relatively new, but, not the 2000 dollar variety. I "snuck" this under the mattress and my husband couldn't believe it when he crawled into bed. He was asleep before me! smile BTW..I installed this by myself, but, a helper is definitely recommended.

    rosescorner, GA
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