---
product_id: 6106699
title: "Under Mattress Support - Fix Your Sagging Mattress with Mattress Helper Firmer Solution for Mattresses - Twin- Single Side Coverage (King)"
brand: "mattress helper"
price: "$U3692"
currency: UYU
in_stock: false
reviews_count: 3
url: https://www.desertcart.uy/products/6106699-under-mattress-support-fix-your-sagging-mattress-with-mattress-helper
store_origin: UY
region: Uruguay
---

# High-density polyurethane foam 31" x 50" targeted support zone Made in USA, multi-patented design Under Mattress Support - Fix Your Sagging Mattress with Mattress Helper Firmer Solution for Mattresses - Twin- Single Side Coverage (King)

**Brand:** mattress helper
**Price:** $U3692
**Availability:** ❌ Out of Stock

## Summary

> 🛌 Restore your mattress, reclaim your sleep — don’t let sagging hold you back!

## Quick Answers

- **What is this?** Under Mattress Support - Fix Your Sagging Mattress with Mattress Helper Firmer Solution for Mattresses - Twin- Single Side Coverage (King) by mattress helper
- **How much does it cost?** $U3692 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/6106699-under-mattress-support-fix-your-sagging-mattress-with-mattress-helper)

## Best For

- mattress helper enthusiasts

## Why This Product

- Trusted mattress helper brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Targeted Sag Fixation:** Precisely reinforces the softest mattress areas where your torso rests nightly.
- • **Ergonomic Back Support:** Medium-firm foam acts as a support plate to alleviate back pain and improve sleep posture.
- • **Proudly Made in the USA:** Multi-patented, quality craftsmanship ensures reliability and peace of mind.
- • **Durable High-Density Foam:** Engineered polyurethane foam maintains firmness and resists compression over time.
- • **Easy Upgrade for Old Mattresses:** Transforms sagging beds without costly replacements—perfect for budget-conscious professionals.

## Overview

The Mattress Helper Under Mattress Support is a 31" x 50" high-density polyurethane foam insert designed to reinforce sagging mattresses by targeting the softest areas under your torso. Ideal for use on flat spring boxes or platforms, it provides medium to firm support that helps relieve back pain and restore mattress shape. Made in the USA with a multi-patented design, this durable solution extends mattress life and improves sleep quality without the expense of a new bed.

## Description

Mattress Helper Sagging Mattress Support. It's a fact: Regardless of your weight, your mattress won't hold its shape forever. In fact, it'll begin to sag a few years out of the box. Mattresses become more and more concave over time, and mattress toppers will only give you a softer feel, but won't solve your problem. Well, we can help with that. What to do: We're offering you a way to restore your sagging mattress and make your bed feel heavenly again. It goes without saying that a bad night's sleep makes you 100% grumpier in the morning. So get the support you deserve on the budget you've got with Mattress Helper today! Twin contains (1) 31" x 50" mattress supports. Queen contains (2) 20 >> x 50" mattress supports. King contains (2) 31" x 50" mattress supports. Materials: Polypropylene & Foam

Review: It worksssss! - Guys. Look.... I don’t write fake reviews ever so please believe me when I say that I am SO HAPPY a that I hit buy on this mattress support. I typically do a lot of research, to be honest, but this time I read a few reviews and was like.... I’m doing it! Even if it only works for 5 or 6 months, it still will be worth it to me to have good sleep. Some back story: my partner and I were gifted this bed from my mom’s guest room. It wasn’t perfect but we were moving in to a place on short notice and didn’t have the extra money to spend. It’s never been the most comfortable but it started sagging on the sides we end up sleeping on, with a bar of regular non-indented bed down the middle. We both sleep hot so we don’t typically sleep in the middle. I sleep on my side and she sleeps on her stomach. I don’t know how this doesn’t kill her back but it sure does mine, plus my hips and knees. Moving on, I got the item yesterday, super quickly as usual, and put it into place about 5 seconds later. I struggled a bit doing it myself, I’m not going to lie. The mattress is heavy and the item is hard to manage because it’s not flat and stiff. I managed, though. I then looked st the bed and marveled. I could clearly see that my partner’s side was still sagging in the one spot while my side was level with the raised middle part. The moment of truth came when I laid down on the bed soon after. It worked! It truly worked! I had managed to get the support into the perfect spot on the first try AND it worked! I slept on it last night as well and YESSSSS. It really does work! I’m ecstatic. Don’t take my word for my reviews not being fake. Scroll through a few of them and you’ll see I’m very honest at all times.
Review: IT WORKS!!! - Well, first of all, I've waited a number of months to be sure this thing really works, and IT DOES!!! Every sleeper's situation is unique so I will tell you a little about mine (yawn!). I rent a furnished apartment and the bed was fine when I arrived, nothing special; definitely hand-me-down (a little icky, I know). But after sleeping comfortably on it for a couple of years I noticed a definite valley in the middle. I have sciatic nerve problems with my lower back, so I thought a new mattress might make a difference. However, my landlord declined to buy me a new one, so I started looking into futons, thinking something more firm would be the ticket. I found some interesting looking ones on desertcart, but they were all more than I wanted to spend (on principle - I'm paying for a furnished apartment, after all!). Then I noticed this product and for only $59.00 (at the time) I thought why not! So several months later, using the Mattress Helper and a rigid piece of plywood on top of the box springs has restored my bed completely, so that there is no indentation in the middle and I sleep well on it again. Highly recommended!!!! Oh, I forgot to mention that at first the mattress helper actually raised the middle of my bed a little higher than the sides, so it helped to sleep right on top of the middle. Now, after a couple of months, the bed is level so I can stretch out anywhere. Consider this when you buy. If two people use the bed (or 3?!), you probably should get two and each person should sleep on his or her mattress helper to break it in. And maybe place them close together under the mattress so there is no valley between them. Make sense?

## Features

- Polyurethane
- Chair Lift Mattress: Designed to lift the old sagging mattress towards the firmer original shape. IMPORTANT - Works best with a flat spring box or platform under your mattress.
- BACK SUPPORT FOR SLEEPING: Supports back pain relief by acting as a support plate. If you experience pain as a result of using this or any product, stop using. Medium to firm support.
- Durable High Density Foam: Firms and Firms Wide, Soft Mattresses
- Medical Medical Approved: **NOTE** Product does not fit under the entire mattress, but only 31" x 50" long filling only in the soft/sagging area where the body torso sits night after night!
- MADE IN THE USA: Multi-patented design made with pride in the United States of America.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00EIR9JMQ |
| Age Range (Description) | 3 years |
| Batteries required | No |
| Best Sellers Rank | #1,511,276 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #2,181 in Mattresses |
| Brand | Mattress Helper |
| Closure Type | Pull On |
| Color | Yellow |
| Customer Reviews | 3.8 3.8 out of 5 stars (1,553) |
| Fabric Type | Polyurethane |
| Is Discontinued By Manufacturer | No |
| Item Firmness Description | Medium |
| Item Weight | 3 pounds |
| Item model number | 31 Inch by 50 Inch |
| Manufacturer | Mattress Helper |
| Material | Polyurethane |
| Model Name | 31 Inch by 50 Inch |
| Number of Items | 1 |
| Product Care Instructions | Spot clean only. Keep dry. |
| Product Dimensions | 50 x 31 x 4 inches |
| Refill | Durable High Density Foam |
| Size | Twin/Half King |
| Special Feature | Pressure Relief |
| Specifications | certified frustration-free |
| Thread Count | 400 |
| UPC | 851466005005 |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Mattress Helper
- **Color:** Yellow
- **Fabric Type:** Polyurethane
- **Size:** Twin/Half King
- **Special Feature:** Pressure Relief

## Images

![Under Mattress Support - Fix Your Sagging Mattress with Mattress Helper Firmer Solution for Mattresses - Twin- Single Side Coverage (King) - Image 1](https://m.media-amazon.com/images/I/31JUKPkdFsL.jpg)
![Under Mattress Support - Fix Your Sagging Mattress with Mattress Helper Firmer Solution for Mattresses - Twin- Single Side Coverage (King) - Image 2](https://m.media-amazon.com/images/I/419S7T4jR5L.jpg)
![Under Mattress Support - Fix Your Sagging Mattress with Mattress Helper Firmer Solution for Mattresses - Twin- Single Side Coverage (King) - Image 3](https://m.media-amazon.com/images/I/41RTtWltLlL.jpg)
![Under Mattress Support - Fix Your Sagging Mattress with Mattress Helper Firmer Solution for Mattresses - Twin- Single Side Coverage (King) - Image 4](https://m.media-amazon.com/images/I/41U9pYCpC1L.jpg)
![Under Mattress Support - Fix Your Sagging Mattress with Mattress Helper Firmer Solution for Mattresses - Twin- Single Side Coverage (King) - Image 5](https://m.media-amazon.com/images/I/41zBKI7Hh9L.jpg)

## Questions & Answers

**Q: Does this product work with a platform bed instead of a box spring?  The mattress currently rests on planks, not a flat surface.**
A: My bed is the same. I just adjusted the mattress helper to a slight angle so that it would rest on the crossbars, set the mattress right back down, and no issue. I'm not saying it's perfect, but it can be done, and it seems that the mattress helper is doing it's job.

**Q: My select comfort bed sags in the middle. Will this help?**
A: I think it will definitely help. I have a California king that has an awful sag in the middle. These pads (had to order two because of the size of the mattress) make a really noticeable difference. My boyfriend helps me readjust the pads because they do end up shifting some. But without these pads, I wake up every day with terrible back pains. These really are a life saver because I can't afford a new mattress for awhile. Highly recommend. Oh and they also have mini pads to fill in any gaps you might have when you have a larger mattress like a king and California King. I also recommend pushing the pad(s) to the center of the bed for the best support. So my pads butt up against each other in the center of the bead, making sure they extend completely underneath the end you lay your head down in to sleep. This provides the most support from what I've experienced. I highly recommend the pads. They help me so much! Best purchase I've made in a long time.

**Q: Will it still work if I cut it to fit my couch?  I need support for my sagging couch and couch support that's in the market were all rated "poor".**
A: In theory it should work the same as it would for a bed. Most of these are marketed as being made for the bed or the couch.. So it should work.

**Q: Does it work on memory foam?  I have a queen size that sleeps two people.  One person is heavier and only that side is sagging, do I need to get two?**
A: Thank you for your question. For a memory foam mattress I would suggest that you start off with 1 to see how you like it.  2 are suggested as you may notice that it will make the bed uneven without 2. If you find that you need extra length  you could always purchase the Mattress Helper Mini also sold on Amazon. We have many customers who have used Mattress Helper before on memory foam mattresses and it has worked very well for them.

## Customer Reviews

### ⭐⭐⭐⭐⭐ It worksssss!
*by A***R on December 6, 2020*

Guys. Look.... I don’t write fake reviews ever so please believe me when I say that I am SO HAPPY a that I hit buy on this mattress support. I typically do a lot of research, to be honest, but this time I read a few reviews and was like.... I’m doing it! Even if it only works for 5 or 6 months, it still will be worth it to me to have good sleep. Some back story: my partner and I were gifted this bed from my mom’s guest room. It wasn’t perfect but we were moving in to a place on short notice and didn’t have the extra money to spend. It’s never been the most comfortable but it started sagging on the sides we end up sleeping on, with a bar of regular non-indented bed down the middle. We both sleep hot so we don’t typically sleep in the middle. I sleep on my side and she sleeps on her stomach. I don’t know how this doesn’t kill her back but it sure does mine, plus my hips and knees. Moving on, I got the item yesterday, super quickly as usual, and put it into place about 5 seconds later. I struggled a bit doing it myself, I’m not going to lie. The mattress is heavy and the item is hard to manage because it’s not flat and stiff. I managed, though. I then looked st the bed and marveled. I could clearly see that my partner’s side was still sagging in the one spot while my side was level with the raised middle part. The moment of truth came when I laid down on the bed soon after. It worked! It truly worked! I had managed to get the support into the perfect spot on the first try AND it worked! I slept on it last night as well and YESSSSS. It really does work! I’m ecstatic. Don’t take my word for my reviews not being fake. Scroll through a few of them and you’ll see I’m very honest at all times.

### ⭐⭐⭐⭐⭐ IT WORKS!!!
*by K***R on October 8, 2014*

Well, first of all, I've waited a number of months to be sure this thing really works, and IT DOES!!! Every sleeper's situation is unique so I will tell you a little about mine (yawn!). I rent a furnished apartment and the bed was fine when I arrived, nothing special; definitely hand-me-down (a little icky, I know). But after sleeping comfortably on it for a couple of years I noticed a definite valley in the middle. I have sciatic nerve problems with my lower back, so I thought a new mattress might make a difference. However, my landlord declined to buy me a new one, so I started looking into futons, thinking something more firm would be the ticket. I found some interesting looking ones on Amazon, but they were all more than I wanted to spend (on principle - I'm paying for a furnished apartment, after all!). Then I noticed this product and for only $59.00 (at the time) I thought why not! So several months later, using the Mattress Helper and a rigid piece of plywood on top of the box springs has restored my bed completely, so that there is no indentation in the middle and I sleep well on it again. Highly recommended!!!! Oh, I forgot to mention that at first the mattress helper actually raised the middle of my bed a little higher than the sides, so it helped to sleep right on top of the middle. Now, after a couple of months, the bed is level so I can stretch out anywhere. Consider this when you buy. If two people use the bed (or 3?!), you probably should get two and each person should sleep on his or her mattress helper to break it in. And maybe place them close together under the mattress so there is no valley between them. Make sense?

### ⭐⭐⭐⭐ Story Of My Foam Mattress, New Mattress Helper Mini's, and GREAT Customer Service
*by G***G on December 18, 2014*

I have a 3 yo expensive all latex foam king mattress that started to sag, and I hated to spend thousands for a new bed...plus it seemed such a shame to throw this huge thing into a landfill. Since I was by myself, I thought I would try one mattress helper JUST on the sagging side- which was a mistake. It simply made a raised lump in the bed which was just as bad and uncomfortable as the sag. So I bought another MH to even things out, which worked...sort of. Because the MH was not as long as my bed I had dips at my head and feet- maybe this doesn't happen with an innerspring mattress, but my foam mattress needed to be raised the entire length in order to be completely flat and for me to be comfortable. I contacted the company and spoke with the owner / inventor of MH, and she told me they were coming out with a new MH mini and offered to send me several to try. The mini's look just like the regular MH but have fewer slats. I was sent mini's with 2 extra slats but for a king bed I really needed the 3 slat minis for a perfect fit. But the mini's I received did even out the head and foot of the mattress enough where I could be comfortable . I assume my issues with the MH not being long enough had a lot to do with the fact I had a HEAVY foam mattress and any part of it which wasn't supported by the MH would slope downward, just due to the sheer weight and flexibility of foam. The mini's fixed that issue by putting the MH under almost the entire length of my bed. I also had to put heavy cardboard under the MH because I have a foundation- not a box spring- which is essentially just a box with slats that the mattress rests on. Without the cardboard, parts of the MH would slip between the foundation slats, but once I put some support there that was not an issue. Wasn't a big deal, but you need to make sure the MH has a solid surface to sit on otherwise you won't get it to support the mattress like it should. I have now had the system in place for several months and the MH and minis haven't shifted or flattened out at all. There are so many different types of mattresses and mattress problems it is impossible to say if this solution will work for everyone, but I believe it is worth a try for most people. The owner of this company gives wonderful customer service and stands behind her product, giving you 30 days to see if it works for you. She really went out of her way to work with me to fix the issues I was having, and even followed up several times to make sure the MH and mini's were working. I feel strongly about supporting companies who care about their customers and give outstanding customer service ( often so hard to find !).... I am happy I found Mattress Helper! PS You may also want to try the mini's under a sagging sofa ....worked great for me.....I don't think the Mini's are on Amazon at this time but you can purchase direct from the company....and no, I don't work for them ( lol)....I'm just a customer like you! Update 5/29/16 ....About 6 months ago I had to bite the bullet and buy a new mattress. The helper is poly foam and eventually breaks down just like the poly foam in mattresses. So the mattress helper bought me some time, about a year. I had my parents buy the helper also and the same breakdown happened to them...helps at first but not long lasting. I also see a pretty big price increase for the product since I purchased it. Due to it's short lifespan and increased cost I'm downgrading to 4 stars. Still may be worth a shot for a short term fix, and I still think this small company owner givers great service...but don't expect a long term solution to a sagging mattress. PS.... If you are looking for a new mattress check out the many online mattress companies...Most are so much cheaper, higher quality, and stand behind their products MUCH better than retail stores.

## Frequently Bought Together

- Mattress Helper Under Mattress Support - Fix Your Sagging Mattress Firmer Solution for Mattresses - Twin- Single Side Coverage (King)
- LINENSPA Memory Foam Mattress Topper - 3 Inch Gel Infused Memory Foam - Plush Feel - Cooling and Pressure Relieving - CertiPUR Certified - Dorm Room Essentials - King Size

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-01-23*