5 Best Mattresses That Won’t Sag — Buyer’s Guide and Reviews

Lying in a hammock between palm trees and slowly dozing off to the waves crashing on the beach sounds like a dream.

But when your bedroom mattress turns into a hammock, no wave sounds will help you get a good night’s sleep.

Unfortunately, sagging is one of the most common complaints users have about their mattress, and it has a proven negative impact on your body and health.

Thankfully, some models are more durable than others. And today I want to share my reviews of 5 best mattresses that won’t sag and will support your sleep for years to come.

So, let’s dive right in!

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Our Reviews of 5 Mattresses That Won’t Sag

Editor’s Choice — Best Mattress That Won’t Sag

Dreamcloud mattress should not sag because of its eight-layered construction with medium firmness not only prevents sagging in the long term but also offers you support and comfort that are off the charts. 

This mattress is a hybrid. Its base is a layer of pocketed coils with quick motion response for fans of a bouncy feel. The coils promote breathability and add to the anti-sagging design and durability of this mattress.

If you’re on the market for a valuable investment and want a luxury bed that will do its job for years, this model will be great for you.

Best for Heavy People

Another hybrid model on my list, the Winkbeds Plus is actually one of the best mattresses that won’t sag even under heavier sleepers. Initially designed with them in mind, this bed packs a bunch of features and can ensure you a truly comfortable sleep.

Overall, I feel that the Winkbeds Plus will make an excellent investment not only for heavy sleepers but also for those who prefer a firm mattress. Just make sure you don’t mind the bounce.

Best for Organic and Eco-Friendly Materials

My dear eco-enthusiasts, I didn’t forget about you either. This model has made it to my list of top-rated mattresses that won’t sag because it’s made from natural Talalay latex from top to bottom. Doesn’t that make it one of the most eco-friendly options?

If you’re willing to spend more to get an eco-friendly latex mattress that will serve you for years, the Zenhaven is your ideal bed!

Best for Flippable Design

Now, I believe that the Nolah Signature needs to be mentioned in my review of mattresses that won’t sag because of the foam comfort and versatility it offers.

So, if you’re looking for versatility or just haven’t found your preferable firmness yet, the Nolah Signature will work great for you.

Best for Hot Sleepers

One more model in my review of top-rated non-sagging mattresses is the Saatva, and it’s here because it’s made from luxury materials and can cool down even a burning hot sleeper! Not mentioning that it all comes at a very affordable price.

Overall, I think that fans of innerspring beds and hot sleepers will appreciate the Saatva most of all, for its bouncy feel and breathable construction.

Cheap Mattress for Back Pain

Another option for those who appreciate the bounce. This model by Brooklyn Bowery has made it to my list of the best reasonably-priced mattresses due to the comfort levels and the pain relief it provides, especially for those suffering from back pain.

Honestly, I feel I can recommend this mattress literally to anyone. It has a balanced feel and great pain relieving properties no matter what type of sleeper you are. Considering its price, that’s a real steal!

Why Does a Mattress Sag?

Sagging is one of the most common mattress defects. Usually, indentations appear in the middle of the mattress, but saggy edges are also possible.

But why does it happen?

Here are a few reasons why your mattress may lose its shape:

• Your mattress is old. All mattresses have a certain lifespan, meaning all of them tend to lose their supportive properties just because the time has come. However, some external factors can contribute to sagging as well. For example, if you use a heater near your foam mattress, it can become softer and less resilient a lot sooner than it’s supposed to.
• You share a bed with a partner. If you love to sleep in a spooning position, this can be the main reason why your mattress is sagging in the middle. Yet, if you sleep on separate sides of the bed for years, then several indentations will appear sooner or later.
• You sleep with pets. Seems a bit weird, but yes, if you have a large dog and allow him to sleep on your bed, he can also leave a small, sagging spot, for example, in your leg area.
• Your mattress is poorly made. Now, there’s a big difference between a good budget mattress and cheaply made one. The latter usually uses low-quality materials that aren’t designed to withstand even an average weight sleeper for long. Cheap foams in foam mattresses, as well as the absence of reinforced frame in innerspring beds or the use of blended latex in latex mattresses, will definitely contribute to your mattress sagging on the edges and in the middle.

Flipping and rotating your mattress regularly can slow down the sagging process. Note that some mattresses are not designed to be flipped, though. You’d better inquire the manufacturer about it before actually doing it.

Is Sleeping on a Saggy Mattress Really That Bad?

Well, shortly speaking, yes.

A saggy mattress can wreck your health in a lot of ways and I will list some of them below.

Aches and Pains

A sagging mattress and back pain is a common combo. Besides putting a healthy spine out of alignment — which will result in soreness and episodes of acute pain the next morning — an uncomfortable mattress can aggravate the existing health conditions.

But how do you know it’s your saggy mattress that causes you pain?

Look for these signs:

• the pain appears upon awakening in the morning and goes away after an hour or two;
• the stiff feeling may completely disappear after quick stretching or a yoga session;
• if you get a chance to switch a bed for a night — for example, when staying at a friend’s house or a hotel — you will wake up well-rested and painless.

Poor Sleep and Insomnia

Lack of support from a saggy mattress may result in disrupted sleep.

Here are the signs:

• you need more time to find a comfortable position to fall asleep;
• you wake up in the middle of the night with numb hands or legs.

If you ignore these signs and continue sleeping on a sagging mattress, your brain might begin to associate your bed with poor rest and sleepiness the next day, which will likely give you a hard time falling asleep, if you manage to do this at all.

Dust Accumulation

Since sagging is most often linked to an old mattress, it may pose a few more threats to your health (apart from discomfort and disrupted sleep):

• dust mites;
• mold;
• bed bugs.

Mattresses accumulate dust and organic particles — such as your skin, hairs, and sweat — which make up a perfect habitat for dust mites. These creatures are the most common cause of allergies. And mold allergy is also quite common.

As for bed bugs, along with just being gross, they can cause skin rashes and spread some dangerous diseases.

So, if you began to feel any of the typical allergy symptoms, then, rather than trying to fix a sagging mattress, throw it away and finally buy a new one!

Does Mattress Warranty Cover Sagging?

Typically, the saggy spots appear after your trial has expired. Which may lead you to a reasonable question:

Does my mattress warranty cover sagging?

Because if yes, then fill in a warranty claim and — poof! — you can get rid of the old mattress and get a new one.

However, it’s not that simple.

To consider sagging as a defect, the indentation must reach below a certain level. Some brands name the range between ½” and 2”. But to know for sure, check the warranty conditions for your particular model.

Now, the most accurate way to measure the depth of a saggy spot in order to know if it is covered by the warranty is the following:

• remove all the bedding (including a mattress protector or pad, if you have one);
• take a thick string or thread and stretch it along the mattress surface, above the indentations;
• use pins to hold the string in place;
• take a ruler or tape and measure the distance between the string and the deepest point of your indentations.

Once you have a figure in inches, see if it’s below the level of sagging mentioned in the warranty conditions. If it is, go on contact the manufacturer. Chances are, you won’t need to buy a new bed.

Which Types of Mattresses Won’t Sag?

I hate to break it to you, but if there were a non-sagging mattress formula, the whole mattress industry would go bankrupt. Because why purchase a new bed if your old one is eternal?

However, some types of mattresses perform better than others in terms of sagging.

• Foam mattresses. Memory foam mattress sagging isn’t uncommon, because this material tends to become less resilient quite fast. Cheaper and softer foams are especially prone to indentations. That’s why if you love the memory foam feel but want your bed to last longer, look for models with a dense core and high-quality foam blends.
• Latex mattresses. Latex is typically more resilient and durable than memory foam. Actually, all-latex beds have the longest lifespan on the market. But of course, this comes at a price, which may not suit everyone’s budget.
• Innerspring mattresses. These are generally quite firm and dense, which means they can hold their shape for quite a long time. But if your mattress has a poorly made coil system, this can be an issue, as the coils may break under your weight or just lose their springiness fast.
• Hybrid mattresses. These beds have the best of all worlds and often come with an advanced construction to ensure uniform support throughout years of use. But similarly to innersprings, hybrid may start sagging earlier if the coils are of low quality.

Pillow top mattress sagging usually occurs because the soft filling forms small lumps while the rest of the mattress construction remains uniform. In this case, it may be enough just to replace the pillow top.

How to Choose the Best Mattress That Won’t Sag?

Now, I understand that you might be a bit lost, given all the information provided.

That’s why I’ve pointed out the key things you should consider:

• Foam density. In foam mattresses, the denser the foam, the more durable it is. A good rule of thumb is to look for the density of 1.5-2 lbs./ft³ for polyfoam and 3.5-5 lbs./ft³ for memory foam.
• Latex type. Latex mattresses can be made either from Dunlop or from Talalay latex. Generally, the former is considered as a more durable option.
• Coils specs. In hybrids and innersprings, steel gauge and coil count are the deal breakers. The former indicates the thickness of the steel wires, and a lower steel gauge means thicker and more durable coils. As for the coil count, it shows how many coils were used. Obviously, the more, the better, especially if you’re a heavier sleeper.
• Foundation. You may be surprised, but the wrong mattress foundation can lead to quicker sagging, even if your mattress is well-made. To avoid this, learn about compatible bed bases for your mattress model and make sure to switch to a more suitable one if necessary.

Conclusion

Now you’re equipped with all you need to know to find a mattress that won’t sag.

Hopefully, the models I’ve reviewed were a good starting point for you. They really are some of the most durable and supportive beds on the market.

But my absolute favorite was the Dreamcloud. It has eight levels of different materials, which, I believe, should perform well in terms of support and comfort for years to come. Having a medium firmness, it can offer a night of cool and refreshing sleep to most users.

But, as I said, it might not work for side sleepers. If that’s who you are — or if you just want more cushioning — there’s no better model for you than the Nolah Signature. Both sides of this bed have unbeatable contouring properties and can support your spine in different sleeping positions.

So, how old is your mattress, what is its type, and when did you start noticing the sagging? Tell us in the comments below!

Product links on Happysleepyhead are referral. We get a commission on purchases made through our links at no additional cost to you. More information in my disclosures.