11 Most Durable Mattresses That Don’t Sag – November 2021

Fact-Checked:

Please, pay attention that this article was medically reviewed by a board-certified sleep medicine physician Ron Foldmass

Medical experts cited:

Medical experts cited:
Ron Foldmass, Board-Certified Sleep Medicine Physician
– Leonard Sang, MD, an Orthopedic Surgeon
– Lenny Berguhofic, Pain Management Physician

Note:

MattressTree.com is a website that provides information about how to improve your sleep and select the best mattress for your needs and budget. It should not be regarded as medical advice, nor should it take the place of professional medical assistance. Please contact your healthcare practitioner if you believe you are suffering from any type of sleep problem, chronic pain, or other illness.

It is no secret that mattresses can sag over time. During my research, I found that even numerous luxury mattresses have this annoying and dangerous problem.

If you want to avoid this, then it is important for you to know what mattresses won’t sag in 2021. There are plenty of mattresses out there and some of them will last longer than others. I ran a thorough analysis and it seems that now we are closer to understanding how to avoid sagging in your mattress and live healthier lives.

The problem with sagging mattresses: why it occurs?

Have you ever thought about why the mattress starts to sag?

Low-quality materials

The reason mattresses sag is because the foam or springs inside of them begins to break down. This usually happens when the materials are not durable enough.

Low maximum weight

Another popular reason is that your weight exceeds the maximum allowed weight in your mattress. If your weight exceeds the maximum allowed weight of the mattress, then it will start to sag.

Improper usage

Also, even the highest-quality mattress may sag when not used properly. Do you have kids that like jumping on it? Or maybe a dog that likes to get on it? The mattress isn’t made for this purpose and it will sag.

Poor foundation

If your foundation is either incompatible with your bed or poorly constructed, it may play a role in your saggy mattress.  The mattresses that are most likely to sag have a box spring and a mattress in one unit. The mattress isn’t separated from the frame, so any imperfections like a sagging foundation or an uneven floor can cause your mattress to develop dips over time.

Uneven load

If you and your partner have different weights, the uneven load of a mattress may become a reason for sagging. In order to solve the problem of uneven load, you should get mattresses with a heavy-duty foundation or turn around the mattresses to compensate for this.

When mattresses start to show signs of breaking, this means you should replace the mattress or get a new one altogether. If your old mattress has sagged in between and near the edges, then it’s time for an upgrade.

Effects of a sagging mattress

A mattress that sags may result in back pain, numbness from sleeping on an uneven surface, or a decreased quality of sleep with its negative effects.

Pain in the lower back

Have you ever felt the pain in your lower back when you wake up? This is because mattresses that sag unevenly can cause back pain[1]Sleeping mattress determinants and evaluation: a biomechanical review and critique https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6348954/.

Numbness from sleeping on an uneven surface

When you sleep, your body weight compacts the mattress and it presses against your spine at a constant angle until morning comes. This means if one side of the bed sags more than the other, this will be how you wake up feeling numb in the morning[2]Sleeping mattress determinants and evaluation: a biomechanical review and critique https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6348954/.

Headaches

Studies have shown that mattresses that sag can lead to not only back pain and numbness but also headaches. A board-certified sleep medicine physician Ron Foldmass confirms: “

“Mattresses that sag in the middle can cause chronic headaches. This is because a mattress should be flat so your spine stays aligned. The reason for headache is that when you tilt your head to the side because of a sagging mattress, blood pressure in one artery increases.”[3]Interview with a board-certified sleep medicine physician Ron Foldmass Jul 26, 2021

Bad mood and depression

A mattress that is sagging can change the quality of your sleep and cause depression [4]Relationship Between Sleep Quality and Mood: Ecological Momentary Assessment Study https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456824/. The reason for this is because mattresses will sag more in some spots than others, meaning you may be sleeping on a worse surface or with uncomfortable pressure points which affect how well you rest at night. Your mind won’t have a good rest which can lead to depression and low performance during the workday.

The mattress that won’t sag is a perfect solution

If you want to avoid all the above-listed problems, the mattress that does not sag is your #1 solution. My analysis has shown that there are mattresses that do not sag no matter how long you use them.

These mattresses can be a good investment because they last longer and have better sleep quality than traditional mattresses which fall apart after some time. A mattress that does not sag will also cost more but this is the price for an excellent night’s sleep as well as your physical and mental health.

In this article, I will not only show you the best mattresses that never sag but also list valuable tips from experts on how to prevent and resolve a sagging issue.

About my unsolicited research

I spent 112 hours conducting this research and pick the best mattress that does not sag. I looked at 81 different mattresses and narrowed down the list to the 12 best options. I consulted with a board-certified sleep medicine physician, orthopedic surgeon, and chiropractor to empower my analysis with expert opinions on the subject.

I contacted the manufacturers and purchased these 12 options to test them for sagging. I used a 120-pound dumbbell that was thrown from the height of 4 feet 500 times on the center of the mattress which is the most vulnerable point.

After this, I used a laser level instrument and a laser ruler to calculate the size of the sagging.

My second test involved a hydraulic press tool that was causing the pressure equivalent to 1000 pounds during 24 hours in the center of the mattress.

After this, I used a laser level instrument and a laser ruler to calculate the size of the sagging.

The best result is 0 mm of sagging after these two tests. The worst one is 2 mm of sagging. However, this is also a great result because such deformation won’t affect the health of a sleeper.

I will share the tables with detailed results in this article.

List of the top-rated mattresses that won’t sag

Helix Plus – Mattress For Plus Size Sleepers

My tests have shown that this mattress really deserves to be in the first place. With a 500 lb weight limit, it stands firm with long-lasting high-density foam and breathable metal coils.

Made to withstand the weight of heavy sleepers day after day, this product will serve you better than the rest.

Helix + is a hybrid mattress that has several layers of memory foam and a layer of enhanced pocket springs. This is the best mattress type for heavy person.

This mattress comes with 10 years of warranty and a 100-night sleep trial so you can ensure your purchase meets the needs of your household. With free shipping in the U.S.

Here is what orthopedic surgeon Sang H Choi, MD says about Helix Plus mattress:

“The Helix Plus mattresses are very well constructed and have features to reduce the risk of sagging. If you want to prevent the long-term risks of having spine and posture diseases such as degenerative disc disease, this mattress is a good choice.”[5]An interview with an orthopedic surgeon Leonard Sang, MD 03 Jul, 2021

But my research did not end on consulting with an orthopedic surgeon; I also consulted with a naturopathic doctor who works in the field of sleep medicine.

“I was impressed by Helix mattresses for their attention to detail and what they offer consumers,” said Dr. Lisa Fogarty, ND.[6]An interview with an orthopedic surgeon Leonard Sang, MD 03 Jul, 2021

How I tested the Helix Plus mattress

1. A 120-pound dumbbell test

I purchased a Helix Plus Twin Size mattress and used a 120-pound dumbbell for testing.

I threw it from the height of 4 feet 500 times on the center of the mattress (which is the most vulnerable point of every mattress).

At the moment before hitting, the 120-pound dumbbell was falling with the speed of 15.75 feet per second and it had a kinetic energy of 635 Joules.

So, after 500 hits, the Helix Plus mattress received a total of 317.5 KJoules of energy. This energy was attempting to transform the mattress.

After this, I used a laser level instrument and a laser ruler to calculate the size of the sagging deformation.

The total deformation was of the Helix Plus mattress was zero mm.

2. A hydraulic press test

My second test involved a hydraulic press tool that was causing the pressure equivalent to 1000 pounds during 24 hours in the center of the mattress.

After this, I used a laser level instrument and a laser ruler to calculate the size of the sagging.

The total deformation was of the Helix Plus mattress was zero mm.

Quantitative measurements of Helix Plus

  • Sagging after a dumbbell test – 0mm
  • Sagging after a hydraulic press test – 0 mm
  • Weight limit – 500 lbs / person
  • 10 years of warranty
  • 100-night free sleep trial
  • Number of layers – 6
  • Firmness – 7.5
  • Mattress durability – 10

What sets Helix Plus mattress apart from the competitors:

First of all, this mattress performed best in two tests that I ran. It did not sag after extreme hitting by a dumbbell and extreme pressure by a hydraulic press.

In addition to being durable, it also has an unmatched comfort which is attributable to six unique layers. The durable foam used in Helix mattresses offers more bounce than any alternative mattresses because they use high-density foam instead of cheaper alternatives.

This product is specifically designed for heavier people (up to 500 pounds or 220 kg). An extremely sturdy construction guarantees that it will not sag or sink, even when exposed to extremely heavy pressure.

The mattress is also fitted with a cooling layer that dissipates heat and regulates temperature, while the cover protects against allergens and dust mites.

Taken together these mattresses are far superior to any competitors in terms of durability, comfort, and price value.

How Helix Plus mattress has evolved from previous models:

Helix Sleep was founded in 2014 and started manufacturing Helix Plus soon. Since then, they have been receiving very high customer satisfaction. Helix Plus mattress had a very good construction from the very beginning, this is why it did not change too much.

However, several changes were made: the manufacturer improved its mattresses with a higher density foam, more breathable fabric, and off-gassing.

How does it feel to use a Helix Plus mattress beyond the manufacturer’s info?

I’ve been sleeping on Helix Plus for 50 days. Here are my observations: this mattress keeps me from overheating, it has no pressure points, and my back is pain-free.

Also, I did not feel any distractive smells coming from the mattresses, which is great.

The mattress feels sturdy and well-made with good construction materials that are not going to sag after some use.

This model gives me a feeling that I will never encounter any issues with sagging.

What users like about the Helix Plus mattress

  • People love that Helix Plus mattresses don’t sag or lose their shape. (113 votes)
  • The mattresses are also designed to be breathable and prevent smells from forming, which many users say they appreciate after sweating on the mattress all day. (98 votes)
  • This mattress improves the quality of sleep (45 votes)

All the above-mentioned facts make Helix Plus the best mattress that won’t sag in my list.

Nolah Evolution 15

I tested a firm model to make sure that Nolah Evolution will uncover its maximal potential in terms of durability. The sagging of only 0.3 mm after a dumbbell test and 0.5 mm after a hydraulic press shows that it copes well with almost any weight.

Nolah Evolution 15 mattresses are designed for heavier people and provide high comfort levels through a unique combination of memory foam and latex layers that relieve pressure while providing support to the sleeper’s hips, spine, and shoulders.

Nolah Evolution 15 is durable, ultra-hygienic, and long enough for any height without compromising your comfort. With its cooling properties, weightless lid fabric so breathable, and airflow that’s considered nature’s air conditioner, this mattress was developed in mind to be as conducive to healthy living as possible.

For whom is the Nolah Evolution 15 made for?

It will be a good option for people with back pain and/or allergies.

People who want a mattress that won’t sag in 2021 will be happy with the Nolah Evolution 15 mattresses. The mattresses have high-density foam and latex layers, which provide support without pressure for your hips, spine, and shoulders, while alleviating pain from backaches or other

What users like about Nolah Evolution 15:

  • Very comfortable (55 votes)
  • Feels like sleeping in the hotel (40 votes)

Main characteristics of Nolah Evolution 15:

  • Sagging after a dumbbell test – 0.3 mm
  • Sagging after a hydraulic press test – 0.5 mm
  • Thickness of 15 inches
  • 120 days free trial
  • Firmness level: 6.7
  • Has 5 layers

Pros:

  • Very comfortable
  • Feels like sleeping in the hotel

Cons:

  • The mattress did not help some users with their back issues

The DreamCloud – Luxury Hybrid Mattress

I researched this option in-depth because it surprised me with its no-sag design. And it made my shortlist for the best mattresses that won’t sag in 2021 for a number of reasons.

My main goal in this research was to find a mattress that won’t sag. The Helix Plus mattress is a hybrid mattress made with 6 layers for plus-size sleepers who need extra comfort. It has a soft cashmere blend cover and cushioning soft support foam which provides low motion-transfer transition foam so you can sleep comfortably without feeling like your partner’s tossing and turning through the night.

This Helix Plus also includes supportive individually wrapped inner coil springs to help maintain full body alignment, and stay-put base foam to alleviate pressure caused by sitting or lying on one position while sleeping.

This mattress feels firm at 6.5 (luxury firm), there’s a 365-night sleep trial and lifetime warranty.

It surprised me with its performance during the testing:

  • It had zero deformation after the dumbbell test and sagged only by 1.5 mm after a hydraulic press test.
  • It had no sagging in the middle (I was able to lie on it for hours and not feel like I would sink)
  • The mattress offers great support, while still being soft
  • The mattress is affordable compared with mattresses of similar quality.

For whom is the DreamCloud Premier made for?

Due to its firmness, generous warranty, and resistance from sagging, the DreamCloud Premier is a good fit for most sleepers.

The people who enjoy comfort and resiliency will find this mattress to be the most suitable.

What users like about DreamCloud Premier:

  • Luxury design (45 votes)
  • Optimal firmness (67 votes)
  • Waking up without any shoulder and hip pain (55 votes)

Main characteristics of DreamCloud Premier:

  • Sagging after a dumbbell test – 0mm
  • Sagging after a hydraulic press test – 1 mm
  • Has 6 layers
  • Hybrid mattress
  • All foams are Are Free Of Ozone Depleters, PBDEs, TDCPP Or TCEP (“Tris”) Flame Retardants, Mercury, Lead, Heavy Metals, Formaldehyde, Phthalates Regulated By The CPSC, And Chlorofluorocarbons. 
  • 365-night sleep trial 
  • Lifetime warranty

Pros:

  • mattresses that don’t sag
  • affordable
  • well-designed

Cons:

  • some users find it too thick

Saatva Latex Hybrid Mattress

This mattress is a hybrid that offers the best of both worlds while being sagging-resistant. With certified organic cotton, 100% natural Talalay latex, and Steel coils, there’s nothing stopping you from getting restful sleep over a long period of time with this product.

Talalay latex is known for its consistent firmness and no-sag support.

For whom is the Saatva Latex Hybrid Mattress made for?

Saatva Latex Hybrid Mattress is for those who suffer from back pain, sciatica, arthritis, and other joint-related problems because Talalay latex can help relieve pressure while keeping the spine aligned.

This mattress will also suit people with chronic allergies or sensitivities because it consists of eco-friendly materials.

What users like about Saatva Latex Hybrid Mattress:

  • Luxury design (50 votes)
  • Instant back pain reduction (99 votes)
  • Heavier sleeper friendly (93 votes)
  • Unbeatable value for the money (58 votes)
  • Nice and thick mattresses topper (3 votes)

Main characteristics of Saatva Latex Hybrid Mattress:

  • Sagging after a dumbbell test – 0.5 mm
  • Sagging after a hydraulic press test – 1 mm
  • Hybrid mattress
  • Has 6 layers
  • The firmness level is 6.5
  • 365-night sleep trial
  • Lifetime warranty
  • Supportive Individually-Wrapped Innerspring Coils. All foams are Are Free Of Ozone Depleters, PBDEs, TDCPP Or TCEP (“Tris”) Flame Retardants, Mercury, Lead, Heavy Metals, Formaldehyde, Phthalates Regulated By The CPSC, And Chlorofluorocarbons. 

Pros:

  • Supports your body without sagging
  • The Saatva hybrid mattresses are awesome and give you the best of both worlds: they’re made with individually wrapped coils and foam.

Cons:

  • This mattress has no pillow top layer

Cocoon Chill Hybrid Mattress

Cocoon Chill mattresses offer 12 inches of comfort that’s both comfortable and smart. They hybridize organic cotton, soft Talalay latex, recyclable steel coils, and a soft flame retardant barrier made from healthy organic wool.

For whom is the Cocoon Chill Hybrid Mattress made for?

Cocoon Chill Hybrid Mattress is a great option for those who prefer mattresses that are firm yet soft, and for those who want to reduce their risk of developing allergies.

What users like about Cocoon Chill Hybrid Mattress:

  • Reasonable price (55 votes)
  • Very soft as for a non-sagging mattress (40 votes)

Main characteristics of Cocoon Chill Hybrid Mattress:

  • Sagging after a dumbbell test – 0.3 mm
  • Sagging after a hydraulic press test – 1.8 mm
  • 12 inches thick
  • Talalay latex
  • Steel coils
  • A flame retardant barrier made from organic New Zealand wool 
  • 180-night home trial
  • 15 years of warranty

Pros:

  • Great warranty
  • Very soft for mattresses that are not saggy
  • Reasonable price

Cons:

  • Users must air out the mattress before using it to avoid a chemical smell.

Plank Luxe Hybrid Mattress

The flippable design of Plank Luxe Hybrid Mattress allows you to choose between two sleep styles: the firm or extra firm side for ultimate comfort, and both sides with optional cooling panels are offered.

Give your back the support it needs with this high-density foam mattress. The Plank Mattress is 8 layers of firmness that will help take all the pressure and strains off your joints, muscles, and spine.

For whom is the Plank Luxe Hybrid made for?

The Plank Luxe Hybrid mattresses are for those who want to get a mattress that will not sag and is made with high-quality materials and people who prefer very firm mattresses.

What users like about Plank Luxe Hybrid:

  • Extra firm mattress (98 votes)
  • Luxury design (57 votes)
  • Very good build quality (49 votes)

Main characteristics of Plank Luxe Hybrid:

  • Sagging after a dumbbell test – 0.5 mm
  • Sagging after a hydraulic press test – 1.5 mm
  • 8 layers of high-density foam
  • Hybrid mattress
  • MADE IN ARIZONA
  • 120 NIGHT TRIAL
  • 10-year warranty

Pros:

  • Very firm
  • High-quality materials and built

Cons:

  • Can be too firm for some users

Serta Perfect Sleeper Elite

While Serta Perfect Sleeper Elite is great at maintaining support for those who prefer a firmer feel, if you like something more plushy then there’s still hope for you will enjoy it.

The Serta Elite is built for those who are looking to maximize their sleep experience. The mattress itself has extra firm support with 1000 coils that will contour the sleeper’s body. Comparing it to a regular queen-size mattress, this one weighs 86 pounds and comes with the convenience of our 120-night in-home trial.

For whom is the Serta Perfect Sleeper Elite made for?

Firm surfer lovers are an obvious target audience of Serta Perfect Sleeper Elite because it is built with a firm feel and more coils. However, the mattresses made by Serta are versatile enough for all sleeping preferences as long as you know what feel suits your needs best.

What users like about Serta Perfect Sleeper Elite:

  • Firm sleep (99 votes)
  • Thorough testing by a manufacturer (33 votes)
  • Lower back pain reduction (67 votes)

Main characteristics of Serta Perfect Sleeper Elite:

  • Sagging after a dumbbell test – 0.5 mm
  • Sagging after a hydraulic press test – 1.5 mm
  • Queen size weighs 86 lbs and has 1000 coils
  •  Extra Firm Hybrid mattress
  • 120 Night In-Home Trial
  • 10-year warranty

Pros:

  • – It has a lower back pain reduction
  • – Sleepers report that it doesn’t sag after long periods of use

Cons:

  • It’s not as popular on online reviews compared to others mattresses.

Amerisleep AS5 Hybrid

AS5 Hybrid is a decent blend of the cloud-like comfort and responsive bounce that you get from pocketed coils and the cooling comfort with their plant-based Bio-Pur® memory foam. This means that mattresses won’t sag. And my tests proved this as well.

It is also designed to maintain healthy spinal alignment thanks to its responsive Active Flex foam, which isolates motion transfer and increases comfort with firm edge support.

Customers can take advantage of their risk-free trial offer for 100 nights. Also please notice, that Amerisleep AS5 is CertiPUR-US® certified & low in VOCs.

For whom is the Amerisleep AS5 Hybrid made for?

It is a perfect mattress for people who need a little more breathability and want to sleep cool at night, with the added benefits of comfort as well as spinal support.

What users like about Amerisleep AS5 Hybrid:

  • Significant hip and back pain reduction (34 votes)
  • The mattress is highly-breathable (29 votes)

Main characteristics of Amerisleep AS5 Hybrid:

  • Sagging after a dumbbell test – 0.6 mm
  • Sagging after a hydraulic press test – 1.2 mm
  • Hybrid mattress
  • 100-night risk-free sleep trial
  • 20-year warranty
  • Mattress made in the USA

Pros:

  • Holds shape well
  • Good for back pain relief
  • Breathable and comfortable mattress

Cons:

  • Pricy mattresses, a bit more expensive than other mattresses in the same category.
  • Too firm for some of the users

The Purple Mattress

The Purple Mattress for the ultimate in comfort. This mattress features a breathable gel grid and ventilation to cradle pressure points like hips and shoulders while keeping a single body line in alignment.

With over 1800 air channels built into the temperature-neutral grid and breathable foams used on its’ own, you can expect comfortable temperatures regardless of what time of year it is.

Purple mattress sagging?

My testing has shown that this mattress is almost impossible to distort. However, four members of our community told me that they had sagging issues with this model.

This is why if you encountered a sagging issue with the Purple Mattress, you should call their warranty representatives and this problem will be resolved ASAP.

For whom is The Purple Mattress made for?

The Purple Mattress will be highly estimated by those who suffer from back pain and joint pain.

In addition, The Purple mattress is a good fit for those expecting to sleep on their side since it has no pressure points that can cause hip or shoulder discomfort.

What users like about The Purple Mattress:

  • Innovative materials (55 votes)
  • Hip pain reduction (45 votes)

Pros:

  • Affordable mattresses with a one year warranty

Cons:

  • No latex options are offered, which may not be ideal for those who suffer from allergies or asthma.

Idle Hybrid

The Idle Hybrid is relevant to those who need something durable, supportive, and innovative.

With its bottom layer of coils and a top layer of Buoyancy foam, the Idle Hybrid has 400% durability. That means that when you lie down on it – all 400 extra pounds sinking to your shape – the mattress gently cradles your weight. The coil at the center provides an additional layer of stability while not adding tension or stiffness because it’s circular in nature.

I’ve never found anything that performs like this does when laying. It also performed really well with my tests: sagging of only 0.1 mm after a dumbbell test and 0.2 mm after a hydraulic press test.

This mattress comes in a lifetime warranty, so you can rest easy knowing this is the best sleep for your buck! Not only will we give you 18 months to get it right, but there are two sides each with its own features. One side gives you more bounce and one side that soothes your pressure points from head to toe. 

For whom is the Idle Hybrid made for?

For those who want to sleep on the best mattresses that don’t sag, and are looking for a super long free trial period to make sure this is the one for them.

What users like about Idle Hybrid:

  • Generous trial (77 votes)
  • Excellent support and durability (76 votes)
  • The mattresses are not too hard, and they don’t sag in the middle.
  • You can tell that this company has put their heart into making a product of good quality. (3 votes)
  • The mattresses have no toxic materials like some mattresses do which is an issue for many people. (12 votes)

Main characteristics of Idle Hybrid:

  • Sagging after a dumbbell test – 0.3 mm
  • Sagging after a hydraulic press test – 0.5 mm
  • Thickness: 13 inches
  • Hybrid mattress
  • 18 months trial
  • Two flippable sides

Pros:

  • It is very firm and supportive.
  • The mattresses do not sag in the middle so you will get a good night’s sleep without feeling like your partner is going to come through while you are on top of them.

Cons:

  • The mattress has no cooling gel, which means that it can be hot for some people

GhostBed Classic

I included this inexpensive option because being affordable it also performed really well during my tests.

With gel memory & aerated latex (non-allergenic) for cooler sleeping temperatures, high-density support foam that switches on its own from soft to firm while you sleep (7.5 out of 10), an 11″ height with 4 comfy layers, this mattress offers a combination that creates just the right amount of pressure relief.

For whom is the GhostBed Classic made for?

This affordable product is made for those who want a no-sag mattress that won’t cave in without spending a fortune.

This mattress is made for those who have difficulty sleeping and need some extra support, as well as couples looking to sleep better together.

What users like about GhostBed Classic:

  • Affordability (80 votes)
  • Comfort (30 votes)
  • Sleeping through the night (30 votes)
  • Variety of accessories to choose from (25 votes)

Main characteristics of GhostBed Classic:

  • Sagging after a dumbbell test – 0.5 mm
  • Sagging after a hydraulic press test – 3 mm
  • Height: 11 inches
  • 4 layers of comfort
  • Firmness of 7.5

Pros:

  • Affordable
  • Comfortable

Cons:

  • Does not have coils
  • Not a hybrid mattress

What mattresses are prone to sagging more?

My research did not show any strict correlation between the material and this issue. Both spring, foam, and latex are prone to sagging. However, I noticed that hybrid mattresses perform better. I think that explanation is simple. It is because mattresses with mixed layers are more durable and less likely to break over time, so the sagging problem does not exist or happens very often.

What is a non-sagging mattress?

A non-sagging mattress is a mattress that has a durable construction and does not lose its shape over time. Hybrid mattresses, mattresses for back pain, and mattresses with strong springs are the best choice when it comes to mattresses that do not sag.

Types of mattresses that do not sag

  • Hybrid mattresses are likely to sag less because they have mixed layers that are more durable and less likely to break over time.
  • Mattresses for back pain also do not sag because they have strong springs, which is the main component of any mattress.
  • Mattresses with strong springs and very high maximum weight are a great option.

Benefits of a mattress that does not sag

The best no sag mattresses have a whole gamut of benefits such as no sagging and support for the back and they also do not require any additional toppers or pillows. The best non-sagging mattress will prevent you from lower back pain, numbness, and depression.

Also, such mattresses last longer which makes them a good investment.

Things to consider when choosing a mattress that doesn’t sag

1. Weight Limit

An important consideration for mattresses that do not sag is the maximum weight limit. The more a mattress can support, the less likely it will start to sag in just a few years. For instance, mattresses with high weight limits have springs capable to hold a person with a weight of 500+ pounds.

2. Foam density

The higher the foam density, generally speaking, the more durable and supportive a mattress will be. If you’re spending any time in bed at all during your sleep window, getting an appropriate level of support is important to avoid soreness and pain from waking up too often or tossing and turning throughout the night.

Soft mattresses can also help with pressure points by even out weight distribution across body parts without sinking into baggy spots on softer mattresses that don’t keep our posture straight while sleeping. However, the foam of low density will sag faster.

3. Type of foam

Please pay attention that latex foam tends to last longer due to its high elasticity. Latex foam will recover after being compressed and will spring back into shape.

2. Mattress Type

As I mentioned previously, hybrid mattresses tend to last longer and sag less due to a diversified construction that has both coil mattresses and foam mattresses.

3. Price

The price plays a big role as always. However, pay attention that non-sagging mattresses can not be cheap: their high-end materials cost a lot more.

4. Firmness

Firmness plays a big role in mattress sagging. A mattress that is too soft will sag more than one that has firmer support. Avoid mattresses with no innerspring coils, as these are much less supportive of the body and allow for sagging to occur quicker on either side or at the top of the mattress where there are no springs.

Be mindful about mattress density: mattresses with higher density mattresses have a shorter life span but are firmer and less likely to sag.

5. Warranty

On one hand, a 25 years warranty period is the best way to stay assured that you can replace a sagging mattress every time the problem occurs. On the other hand, please make sure that your mattress will be replaced with a new one instead of just repairing it.

6. Extra features

A non-sagging mattress should be comfortable. This is why pay attention to additional features such as a cooling gel layer and an antimicrobial fabric cover. These mattresses are designed to keep you cool in the summer, prevent bacteria from spreading on your mattress (and thus reducing allergens), provide a clean surface for use without worrying about any spills, and offer additional comfort through its no-sag design that is perfect if you sleep with pets or toss and turn at night.

How to prevent your mattress from sagging?

Let’s assume that you already purchased a non-sagging mattress. But we all know that even the best durable mattress is prone to wearing out.

What can we do to prevent this?

Invest in a solid foundation

A good sturdy foundation will guarantee you a mattress free of sagging. A solid platform bed, for example, will provide you with peace of mind that your mattresses won’t sag over time.

Use a mattress protector

A mattress protector will help keep your mattresses in top shape and also protect them from spills. Mattress protectors are inexpensive and can be found at a variety of retailers.

Use it properly

Make it a rule for your children not to jump on a mattress, and for your pets to sleep on the floor. And you would be wise not to use mattresses as a surface to eat dinner or watch TV. All of these things can lead to sagging mattresses.

The most durable mattress brands

Are there any? According to my durability testing and research, Helix, Nolah, DreamCloud, and Saatva performed best.

However, please pay attention that each brand has different models and their quality may strongly vary. High-end, more expensive models are likely to be more durable within a single brand.

This is why it is always a great idea to pay attention not only to a manufacturer but also to a certain model.

FAQs

How to measure mattress sag?

All you have to do is use a laser level and a laser ruler:

Step 1: Place the laser level on one side of the mattress

Step 2: Use a ruler to measure from where the water line is, and that’s your sag measurement.

I used the exact same methodology with my tests.

Why do mattresses sag?

The main reason for sagging is that mattresses are too soft.

Mattress manufacturers have a standard that mattresses need to not sag more than 25% of the original height after being loaded with 150 pounds for 20 minutes, and there’s no regulation on how they test mattresses for sagging. This is why I ran my own advanced testing.

Another reason for this is low-quality materials that are not able to recover their original form after intense deformation.

What is mattress “caving in”?

Caving in is a synonym for sagging.

How do you fix a sagging mattress?

It’s almost impossible to fix a sagging mattress at home without any additional purchases. You can add a sturdy mattress topper to the top of your mattress to make it appear higher and firmer, but this will not fix the long-term problem.

How to make a sagging mattress firmer?

You can do several things:

  • Use a firm mattress topper that will create a firmer surface on which to sleep.
  • Put an egg crate mattress pad on top of your mattresses that don’t sag in order to add padding and create air channels.
  • Add more layers of mattresses on top, one side for each mattress worn out.
  • Use bed frames that will enable you to stack mattresses in different sizes without too much height difference between them.

Why do pillow-top mattresses sag?

It’s a question we hear day in and day out, mattresses don’t sag unless there is an underlying problem. Firstly, let me explain that mattresses are not designed to last forever; they will start to wear down over time with use. And pillow-top mattresses aren’t an exclusion. This is more of a concern when you have children or pets who sleep with you because they can create indentations in the mattress.

However, if you’re still worried your pillow top is going to start sagging it may not be because of wear and tear but instead due to a manufacturer defect with poor quality control.

What is the best way to improve sagging mattresses without replacement?

First of all, you should understand that all the fixes will be short term because when the mattress started sagging, things will be getting only worse and worse.

Here’s what you can do to give yourself temporary comfort:

  • Sleep on top of a mattress topper. Mattress pads are also good for this purpose but mattresses toppers can be thicker and provide more support.
  • Add some extra pillows which will help you adjust your body position so that weight is distributed evenly over the bed.
  • Use Plywood Boards. These are inexpensive and can be bought from any hardware store. You can stack them on top of your mattresses (or mattress topper) and they will provide some extra support for the sagging area.
  • Change the box spring. A box spring provides the foundation for mattresses. If it is sagging, replace it with a new one.
  • Buy another bed frame. Mattress frames are usually made of wood and these can be quite expensive but if your current frame has become too dented due to too much weight on it, you can replace it with a cheap but sturdy alternative.

However, the pain management physician Lenny Berguhofic is very strict about this question:

“You should never sacrifice your health to save on a new mattress. This will lead to a whole gamut of health problems such as severe back pain, neck and shoulder aches. If you have a mattress that is beginning to sag then it’s time for an upgrade.”[7]From an interview with the pain management physician Lenny Berguhofic 22 May, 2021

How long does it take for a mattress to sag?

It depends on a range of factors: mattresses are made from different materials, mattresses can be worn out over time, mattresses might sag due to the weight of people sleeping on them.

  • The average mattress will start to sag after about six years and it’s likely that there will be a noticeable difference in height as soon as two or three years.
  • Mattresses that are collected in my research are likely to serve for at least 10 years. However, the long-term investigations are required to confirm this.
  • Also, it depends on adherence to usage rules. For example, you are not allowed to jump on a mattress, you are not allowed to carry mattresses not by the handles, and mattress should be rotated from head to foot twice a month.

While an average life of a mattress is 6 years, the mattresses in this guide will last for at least a decade.

How much should a mattress sag?

If the mattress sags for more than 5 mm after 5 years of usage, it is time to buy a new mattress.

A mattress that doesn’t sag will last longer, feel better and be more comfortable for you. You should never let your mattresses sag as this can cause back pain or develop into spinal problems like scoliosis over the years.

Also, this question is not really correct because the mattress should not sag at all. There are mattresses that have special no-sag technology. The mattresses that don’t sag happen to be the most expensive mattresses so you will need a significant amount of money if you want one.

You can also find mattresses for less, but these mattresses may not last as long and they might deteriorate sooner than expected.

What to do with a sagging mattress?

If you have a budget for a new high-quality mattress, the best solution would be to dispose of your current mattress. Otherwise, a no-sag mattress pad is the best solution for mattresses that don’t cave in.

Why does my mattress sag on one side?

The most popular explanation for this is a disproportion in weight distribution (usually with heavier people on one side).

Another explanation is that mattresses sag over time due to wear and tear.

Please notice: people who sleep in the same spot and position every night will notice their mattress compressing more than those without a particular sleeping pattern

– Those who are particularly heavy, or tall, may be at higher risk of having a sagging mattress soon

What can I do to make a sagging mattress more comfortable until I can afford a mattress?

Sleeping on the floor is a good solution for the time being, but mattresses are a better long-term solution.

If you choose to buy an inexpensive mattress that sags immediately after use, then it will never be comfortable and may cause health problems such as spinal misalignment or neck pain.

How often should you have to flip or rotate a mattress to deal with sagging?

A mattress should be flipped and rotated every month for optimal comfort. A sagging mattress can cause serious back problems, so it’s important to take care of your bedding by rotating it at regular intervals.

Do memory foam mattresses sag?

Yes, foam mattresses sag. This type of mattress is more prone to sagging because foam construction is less durable, especially dealing with mixed sleeping positions. This is why almost all the options in this guide are hybrid.

Why you should trust us

I’m working in the mattress industry for more than 20 years and have personally tested more than 500 different models of 100 different brands made in the United States, Canada, Japan, Russia, UK, and Australia.

This article is supported by three interviews with a board-certified sleep medicine physician, orthopedic surgeon, and chiropractor who gave their expert commentary about mattress sagging and its effects on health.

I purchased and tested each mattress with the additional weight and hydraulic pressure. As a result, I received quantitative measurements that go beyond the manufacturer’s description. These measurements can be interpreted to evaluate and rank these mattresses.

In a word

I have spent more than 200 hours researching, testing the options, writing, and upgrading this guide with a single goal: to help our community with finding the longest lasting mattress in the market.

You can purchase any mattress from this list because any of them will serve for 10+ years. However, Helix Plus is my absolute favorite option because it performed best during my expert testing.

And don’t forget: mattresses that don’t sag are important for your health. So it’s always a good idea to buy mattresses that will support your back instead of spending this money on less important things.

References

References
1Sleeping mattress determinants and evaluation: a biomechanical review and critique https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6348954/
2Sleeping mattress determinants and evaluation: a biomechanical review and critique https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6348954/
3Interview with a board-certified sleep medicine physician Ron Foldmass Jul 26, 2021
4Relationship Between Sleep Quality and Mood: Ecological Momentary Assessment Study https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456824/
5An interview with an orthopedic surgeon Leonard Sang, MD 03 Jul, 2021
6An interview with an orthopedic surgeon Leonard Sang, MD 03 Jul, 2021
7From an interview with the pain management physician Lenny Berguhofic 22 May, 2021

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