Customer Pick
4.3 out of 110 reviews READ REVIEWS

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
110 reviews 4.3 out of 5

Review Breakdown

5 Star
70.91% 78
4 Star
10.91% 12
3 Star
5.45% 6
2 Star
6.36% 7
1 Star
6.36% 7
Would recommend to a friend
  • THEY WORK!!!!

    This product is exactly what I needed. Just purchased a mattress - Casper and it was too soft for my husband. Did not want the hassle of returning the mattress so I bought these and they are great and made the mattress firmer. I have a king bed as with other post a 3rd extender is needed for the foot of the bed. Will recommend.

    Janet27, TX
    Was this review helpful? 0 out of 0 found this review helpful
  • Serves its purpose.

    It is under our king size pillow top mattress that was sinking slightly on my side but not any more with this under the mattress support. Makes the mattress better to sleep on.

    ladylansing, MI
    Was this review helpful? 0 out of 0 found this review helpful
  • Unbelievable

    The best investment I made. Instant relief. I couldnt believe my eyes. What you see on the tv presentation is the results you will see when you try the mattress helper at home. I was going to replace my mattress not now it has new life. Thanks HSN for this amazing product.

    4everler, MD
    Was this review helpful? 2 out of 2 found this review helpful
  • Best Buy ever!

    My mattress is 25 years old. This support made a big difference!Best Buy !

    sas654, TX
    Was this review helpful? 2 out of 2 found this review helpful
  • helped

    I brought a nice new king size mattress about 2yrs ago. Its is sagging on both sides where my husband lies & where I lie. the center is much higher then the sides making you feel like your rolling down hill, I place these on each side & it has made it back to being normal/level .

    phillymoe, NC
    Was this review helpful? 3 out of 3 found this review helpful