Best Mattresses That Don’t Sag and Can Offer You Proper Support

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Written by: Alex Savy
Read 28 minLast updated on June 4, 2021

Since your mattress is often the most expensive piece of furniture in your bedroom, you expect it to last a significant amount of time.

So, I can only imagine how you feel when your bed starts to sag after just a couple of years. Surprisingly, there’s a lot more to it than just your disappointment: A saggy mattress can easily ruin your quality of sleep and have serious impacts on your health.

So, I’ve done some thorough research and am ready to share my reviews of the six best mattresses that don’t sag over years of active use. I’m sure your sleep will be peaceful and healthy with any of them, so check them out below.

A Quick Preview

Best Overall - Editor’s Choice

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AS3 by Amerisleep
Second Best Option

AS3 by Amerisleep
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Botanical Bliss
Best for Versatility

Botanical Bliss
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Best for Pressure Relief

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GhostBed Flex
Best for Cooler Sleep

GhostBed Flex
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Best Value for Money

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Our Reviews of 6 Top-Rated Mattresses That Won’t Sag

Best Overall - Editor’s ChoiceSaatva



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  • tempered steel support core for reliable performance;
  • high-density foam encasement around the edges to offer more sleeping space and uniform support all across the surface;
  • 3-inch pillow-top for improved comfort and gentle pressure relief.

The Saatva Hybrid deserves its spotlight on the list of the best mattresses that don’t sag due to its reliable build. The manufacturer uses thick, tempered steel coils for the base and wrapped low-gauge coils for the comfort layer. Such a combination of quality, rigid materials makes the Saatva quite resilient. Chances are, this mattress won’t disappoint you with premature sagging. 

There’s also foam reinforcement around the edges meant to provide uniform support and extra sleeping space. Now, some users tend to avoid foam as it can sag and lose its supportive properties. However, you don’t have to worry about it with the Saatva. This model uses top-quality high-density foam that should withstand years of use without developing indentations.

All in all, I think this mattress can be an optimal solution for those users who want a mattress that won’t sag. It can boast of reliable construction meant to serve sleepers loyally for a long time (which is backed by a 15-year warranty).

Second Best Option — AS3 by Amerisleep

Amerisleep AS3

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  • extra-long warranty for improved customer protection;
  • thick and dense support core for long-lasting performance;
  • open-cell Bio-Pur foam for cooler sleep without giving up proper contouring.

The next model that belongs to the best mattresses that don’t sag is the AS3 by Amerisleep. The first thing I noticed about this mattress upon arrival was how sturdy and almost rigid it felt. This means it should withstand regular use for years to come (and that is backed by a 20-year warranty).

Now, it’s also worth mentioning the incredible support the AS3 can provide. This mattress molds to the shape of one’s body and aids proper weight distribution. At the same time, because the AS3 uses Bio-Pur foam, it’s not as restricting as regular memory foam models. As a combination sleeper, I appreciate that a lot, as I tend to switch positions frequently during the night and hate feeling like I’m stuck in quicksand.

Best for Versatility - Botanical Bliss

Botanical Bliss by Plushbeds

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  • eco-friendly mattress, safe even for sensitive or allergy-prone sleepers;
  • adjustable firmness to accommodate any sleeper type;
  • breathable cotton cover for improved air circulation during the night;
  • organic wool layer for extra cradling;
  • naturally cool, great for hot sleepers.

Time to welcome another eco-friendly option to my review of the best mattresses that don’t sag. The Botanical Bliss stands up to its name: it’s made of natural latex — produced from the sap of rubber trees, and has a layer of organic wool, which can make your nights blissfully cool and comfortable.

What makes this bed stand out is its versatility. You can change the firmness to your liking — just unzip the cover and change the first two layers (Soft and Medium, respectively) until you have your preferred sleeping style.

Now, natural latex has many resourceful uses. It allows for proper air circulation inside the mattress and offers outstanding durability and edge support, which is crucial if you sleep with a partner. What’s more, latex has tiny little pores, which contributes to the mold and dust-mite-resistant properties of the bed, so you can sleep soundly and allergy-free.

To sum up, the Botanical Bliss is the ideal choice for those of you who don’t know yet how firm you want your mattress to be. It is adjustable, offers close conforming, and sleeps cool.

Best for Pressure Relief - Puffy

puffy mattress

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  • optimal firmness for most sleepers;
  • great motion isolation, ideal for restless partnered sleepers;
  • surprisingly good edge support, offers increased sleeping space;
  • medium feel, would work for a wide range of users;
  • removable and stain-resistant cover for effortless cleaning.

One of the last options in my selection of top-rated mattresses that don’t sag is the Puffy. It’s an all-foam model with a pretty simple construction; which nevertheless, can offer you superb support and nice pressure relief.

The mattress packs three layers under the polyester cover, resulting in a soft to medium feel. There’s a gel-infused foam layer for cooler sleep, a foam transition layer for better load distribution and precise contouring; and finally, a dense foam base for good motion absorption and overall stability of the mattress.

Restless sleepers and partners, here’s something to cheer you up: 

The Puffy has incredibly low motion transfer so any movements will be absorbed right from the get-go. And no, it won’t suck you in like quicksand — you will still be able to easily transition between sleeping positions.

To sum up, I’d say that the Puffy is a reasonably priced mattress with an incredible ability to relieve your pressure points, maintain your spine alignment, and lasts longer than other all-foam models.

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Best for Cooler Sleep - GhostBed Flex

GhostBed Flex

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  • medium feel to accommodate a wide range of sleepers;
  • multiple (and thick) comfort layers for effective motion isolation;
  • reinforced edges to provide more sleeping space;
  • independent coils for targeted support;
  • cooling fiber and gel foam layers to guarantee sweat-free sleep.

Another item that deserves your attention is the GhostBed Flex. This model uses top-quality materials and has an impressively sturdy build, so no wonder it belongs to the best mattresses that don’t sag. However, the list of its strong features doesn’t end there. Guys at GhostBed did everything in their power to flex on us (pun intended) with this mattress’s cooling properties.

This model uses cooling fiber, two gel-infused foam layers, and breathable coils to make sure that every user can enjoy a temperature-neutral sleeping environment. The cover is also quite cool to the touch, which can contribute to the overall temperature-regulating effect.

It gets better: despite using bouncy coils, the GhostBed Flex does a good job of absorbing shock from motion (courtesy of the multiple comfort layers). It could be an excellent solution for those couples who don’t want to disturb each other during the night but also don’t wish to feel stuck in the foam.

On a final note, the GhostBed Flex truly has a lot to offer. This mattress uses quality materials and has a unique feel. It kind of combines the best of all worlds: coils and foam, cool sleep and motion isolation, support and cradling.

Best Value for Money - Nectar

Nectar Mattress

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  • all-foam construction offers a gentle hug and good pressure relief;
  • breathable Tencel cover for a cooling effect;
  • 11 inches thick, flexible enough to be used with an adjustable frame;
  • medium firmness, would accommodate a wide range of sleepers;
  • quilted gel-foam cover for extra padding and cooler sleep.

Proudly leading this list of the best mattresses that don’t sag, the Nectar ticks all the right boxes. This mattress is reasonably priced, uses quality components, and offers reliable support to sleepers.

As this is a foam mattress, you can expect it to have excellent pressure relieving properties. It does a great job of responding to your body curves and helps distribute the weight evenly.

The Nectar balances a gentle hug with solid support thanks to the dense core foam. Another cool thing about this model is the gel-infused memory foam used in the comfort layer. It makes the Nectar more temperature-neutral than many other memory foam mattresses.

Overall, this model is a rare find. It combines good value and quality components, providing solid support and reliability.

Why Does a Mattress Sag?

I hate to break it to you, but no mattress will remain uniform and supportive forever. All beds start to sag eventually. The quality of materials, along with how well the mattress is made, is the determining factor in how quickly this could happen. 

So, what can contribute to faster sagging?

  • Poor foam quality. All types of foam tend to soften and lose their resilience over time, and with cheaper quality foam, it tends to happen faster. Budget manufacturers use polyurethane or less-dense memory foam that has a significantly shorter lifespan and is more prone to forming indentations.
  • Uneven load. If you tend to utilize one particular area of your mattress for sleeping, this may lead to indentations in this area, which will make the surface uneven and reduce its supportive properties.
  • Improper utilization. Placing a foam mattress near the heater or in a room with high humidity can damage the materials and make them more prone to sagging.

And finally, if your mattress is close to hitting the 10-year mark, chances are it has already started sagging, even if you don’t see or feel it yet.

Most Common Places for Saggy Spots to Appear

To determine if your mattress is saggy and it’s time to replace it, you need to inspect the most common places for indentations to appear.

Here they are:

  • The area right under your body. If you share a bed with your partner, you might have two similar indentations on both sides of the mattress. 
  • Edges. Saggy edges often are a result of sitting at the edge of your mattress. A mattress is designed for sleeping only, so if you often use your laptop, watch TV, or read while sitting on it, the risk of sagging can increase. 
  • Both corners at your feet. Indentations there may appear if you have pets and allow them to sleep with you.

Keep this in mind:

Try utilizing the surface more evenly if you can. You can also try rotating the mattress to promote even weight distribution and prevent premature sagging.

How Will a Saggy Mattress Impact Your Sleep?

Your body can adapt to nearly anything, including pretty uncomfortable sleeping conditions. However, it will still send you signals that something’s not quite right. In the case of a sagging mattress, look out for the following sleep-related signs:

  • Tossing and turning. When the surface of your mattress loses its uniformity, you will need more time to find a comfortable position to sleep. Also, you may find the positions you once felt relaxed in start causing stiffness and pain in your lower back or neck (1).
  • Insomnia. Spending hours rolling in your bed from side to side can impact your overall sleep quality and duration. This could even lead to anxiety and worry about getting to sleep.
  • Headaches. When your mattress doesn’t provide proper spine alignment and support, your neck and shoulders are the ones that suffer the most. Squeezed nerves and blood vessels in these areas can result in tension headaches or migraines.
  • Allergies. Saggy spots make a great place for all the nasty things to build up. That includes organic particles, which are the food for dust mites. And you guessed it — most US homes have detectable levels of dust mite allergen in their bed. [2] So, if you start noticing you’re getting a sniffly nose or sore and dry eyes when you wake up, your saggy bed could be the one to blame.
  • Back pain. Sleeping on a saggy mattress can cause the spine to fall into misalignment. The thing is, when the sleeping surface is not uniform and can’t deliver proper support for the back, it would allow for unhealthy curvatures in the spine during sleep. As a result, this can cause pressure build-up in certain parts of one’s back. Later, tension accumulation can lead to back pain and poor sleeping posture.

Poor quality of sleep caused by all these factors can trigger a whole host of chronic disorders that can contribute to a decline in overall health. So, if you think the root cause of these issues could lie inside a saggy mattress, be sure to replace it with a new one as soon as possible.

The Most (And the Least) Sagging Mattress Type

Pay attention, because I’m going to outline the main features that stop a mattress from sagging. The first one is the mattress type.

Today, there are many types of mattresses on the market. Although most of them can be initially uniform and supportive, not all of them stay so for years to come. Let’s dive into each type in more detail.

Memory Foam

The most common material for mattresses, memory foam is quite unpredictable when it comes to sagging. The density and firmness are determining factors here. But other things — such as mattress foundation, the intensity of use, and temperature of the room — may have an impact on how fast your foam mattress loses its resiliency.

Polyurethane Foam

Polyfoam is a cheaper version of memory foam as it requires far less manufacturing resources. It’s also an open-cell structure, which allows it to retain a little less heat compared to memory foam. Yet, this structure is the culprit when it comes to saggy mattresses: 

Polyfoam typically starts losing its shape a lot faster than viscofoam.


The most long-lasting mattress material nowadays (3), latex, is the vulcanized sap of rubber trees. Despite having an open-cell structure like polyfoam, latex has smaller cells and thicker cell membranes, which results in greater resiliency and more supportive properties.


Hybrid mattresses feature a coil system as the base layer. The other layers are typically foam, latex, or other fibers. Coils are more rigid compared to foam, so they can help keep the surface uniform for a longer time, preventing the upper foam layers from developing indentations. But of course, the quality of the material that the coils are made of is the important part here.


Traditional innerspring beds have a simple construction. Unlike the hybrids, they only feature 1-2 comfort layers above the spring block. They are also firm and durable, but their overall durability, just like the hybrid, depends on the coil count and steel gauge used for making the springs.

Air Mattress

Most air mattresses tend to lose some air during the night due to temperature fluctuations, so they generally become softer and sag more deeply. But in the case of a sagging air mattress, it’s easily fixed by simply adding more air. Unless the cause of deflating was a puncture. Then you would first have to patch your air mattress properly.

Water Mattress

Waterbeds are great when it comes to cradling because a layer of water encased in vinyl is the most adaptive material ever invented. Also, if you keep your water mattress in good shape, it can offer uniform support, literally forever. 

How to Choose a Mattress That Won’t Sag in the First Years of Use?

To find a mattress that stands the test of time, without the dreaded saggy bits, you first need to check a few key components. 

Choose the Right Foam Type

Despite some issues with heat retention, high-density foam remains the most durable among synthetic materials, compared to polyurethane and infused foams. If your mattress has a base layer made of high-density foam, chances are it will serve you longer without untimely sagging.

If your budget allows, choose a latex mattress. It may have an unusual feel at first, especially if you’re used to sleeping on foam mattresses, but latex lasts longer than most other mattress materials.

Check Foam Density

To ensure you’re purchasing a quality mattress, it’s important to look at the foam density. Foam density is how much one cubic foot of foam weighs. The higher the number, the denser, and hence, more immune to sagging the foam will be.

Here is the foam density range for each type of foam:

  • polyfoam: 1.7 pounds per cubic foot or higher;
  • memory foam: 3–4.5 pounds per cubic foot for comfort layers, 4.5–5 pounds per cubic foot for base layers;
  • latex: greater than 5 pounds per cubic foot.

Go for the Higher Coil Count and Lower Steel Gauge

If you prefer mattresses with coils, such as hybrids and innerspring, then the main parameters you should check are steel gauge and coil count. Opt for higher coil count as the surface will be more uniform and responsive to your body weight. Choose a lower steel gauge because the coils are thicker and this will have better durability.

Make Sure the Mattress Has Solid Edge Support

Generally speaking, if your mattress has coils, it should also have a reinforced perimeter frame to keep the edges sturdy. The best way to know for sure if a bed has proper edge support is to check the user reviews.

Wrapping Up

Anti-sagging properties of the mattress are influenced by many factors, with the most important being the quality of the materials and mattress construction. Look for models made of denser foams, natural latex, and those with higher coil count and reinforced perimeter, as these typically last longer than others.

Now, allow me to share my champion, the Saatva Hybrid. This mattress was built to deliver reliable, long-lasting performance. It has a coil-on-coil design to provide resilient support and uses high-quality tempered coils that won’t let you down for years to come. Plus, there’s an extra pillow-top layer to add that touch of luxury that so many sleepers would appreciate.

And if you’re looking for something more cradling and hugging, check out the AS3 mattress by Amerisleep. This model offers gentle contouring, uses zoned support, and aids fast relaxation. With its top-quality foam and an extended warranty, the AS3 is a real gem on the mattress market.

So, have you tried any of the above anti-sagging mattress models? Which mattress model from the list appeals to you the most? Let me know in the comments below!


  1. Retrieved from
  2. J Allergy Clin Imunol 2003 Feb;111(2):408-14. Retrieved from
  3. Abe Abbas (2020, May 8). When to Replace a Mattress? Retrieved from

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