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

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).

Read our full Saatva mattress review for more information.

Best for Back Pain — AS3 by Amerisleep

Best No-Sag Mattress for Heavy People — WinkBed

Our Methodology - Why I Picked These Mattresses

In this review, I chose mattresses with robust and tempered steel coils or high-density foam cores to find the best mattresses that don’t sag.

I use in-house techniques to check mattresses for support and durability by taking apart the layers, analyzing the feel and grade of each, and seeing how all the layers feel together when trying out different sleeping positions. I also checked the sinkage, measuring how deep the compressions allow on different body parts. If there’s some cradling for comfort and support for spinal alignment, I’ll know this mattress is an excellent fit to be anti-sagging for a long time. A mix of hands-on reviews of other mattresses, plus knowledge in the mattress field, help me better decide on which mattress is best for not sagging. I will also share more methodology tips at the end of the article so you can better choose which mattress works best for you.

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 to Choose a Mattress that Won’t Sag According to Your Needs

There are many more factors that make a great mattress that won’t sag, not only durable materials and build quality. And considering them can help users make the right choice. So, here are the main pointers shoppers might want to check before finalizing their purchase.

Mattress Type

Now, while users might have an idea of which mattress type is less likely to sag, they also need to figure out which type would feel the most comfortable for them.

In this case, it’s better to consider both the strong suits and the weaknesses of each mattress type. They will give shoppers at least a rough idea of how the mattress would perform for them.

Sleeping Style and Firmness

A good mattress that doesn’t sag should also be able to support the sleeper’s body properly. After all, one’s sleep posture has a direct effect on their back health.

So, here are the general recommendations:

• Side sleepers. Lying on one side means the shoulder and the hip will dig into the mattress. Therefore, for this sleeping style, it’s better to choose softer models that would allow the protruding body parts to sink in.
• Back sleepers. Back sleepers require reliable support to keep the spine properly aligned throughout the night. At the same time, back sleepers need a little bit of sinkage for the hips and buttocks. Therefore, for this sleeping style, medium mattresses usually work the best. Medium-firm models might also do the trick (for those sleepers who prefer slightly firmer support).
• Stomach sleepers. The most important aspect for this sleeping style is support. Stomach sleepers need to remain in a relatively straight line during the night, without the belly sinking and creating an unhealthy curve in the spine. Because of that, stomach sleepers are recommended to pick firm mattresses.
• Combination sleepers. For this sleep position, ease of movement is usually the most crucial aspect. Most combo sleepers enjoy using medium-firm mattresses. This comfort level can be a good compromise between support and cradling for multiple sleeping styles. Plus, medium-firm mattresses are less likely to restrict movement.

Weight

It’s crucial to remember that heavier sleepers apply more pressure to the mattress. As a result, this can cause sagging sooner than expected.

That is why heavier folks (over 230 pounds) are advised to pick slightly firmer mattresses for each sleeping style mentioned above. A firmer mattress would deliver sturdier support. Additionally, firmer models typically use denser foams and thicker coils, which are less likely to start sagging sooner than expected.

As for lightweight sleepers (less than 130 pounds), they shouldn't worry about premature sags. Instead, they need to take care of their pressure points. Choosing softer mattresses for each sleep position can usually help avoid sharp pressure spots, as it’s easier for petite users to compress the comfort layers of softer mattresses (instead of crushing into the surface).

What Else to Consider When Shopping for a Great Mattress that Won’t Sag?

To make the best choice possible, here are the extra factors users might want to consider when shopping for a mattress that won’t sag:

• Warranty. As a rule of thumb, durable mattresses have longer warranties. Naturally, they are less likely to sag. 
• Foundation. A supportive foundation can prevent sags and indentations. Therefore, before investing in a top-quality mattress (which are often expensive), shoppers need to make sure their current foundation would suffice. Solid and slatted foundations are among the most popular types these days. Solid ones can offer firmer support. Slatted foundations are more breathable. However, the slats shouldn’t be spaced too far from each other, especially for foam mattresses (no more than 3 inches).
• Flippable design. Flippable mattresses can offer multiple benefits. First off, they give users more comfort options (and thus, more chances to find the perfect set-up based on their specific needs). Secondly, using a flippable mattress can prolong its lifespan. By flipping it regularly and sleeping on both sides, users can reduce the load on the mattress. This could help slow down the natural wear and prevent sagging.
• Motion transfer. Often, mattresses that don’t sag have a more responsive feel. This can be an issue for partnered sleepers, especially if one of them wakes up easily during the night. Responsive mattresses may allow shock from motion to travel across the mattress’s surface. To avoid that, partnered sleepers may want to consider a hybrid mattress with extra-thick comfort layers, a soft to medium latex model (if this firmness level works for their sleep positions), or a high-density, quality memory foam mattress.
• Edge support. Edges often develop sags earlier than the rest of the mattress, so it’s better to pick models with firmer edges. Hybrid and spring mattresses typically perform the best in this category. Some foam mattresses use extra-dense foam around the edges to reinforce the perimeter. Such models can cost a bit more, but they may postpone sagging around the edges.

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!