Best Mattress That Won’t Sag (2025): Reviews and Buyer’s Guide

A sagging mattress can force you into uncomfortable sleep positions, causing tension to build up along the spine. Over time, resting on an unsupportive bed can lead to chronic pain and insomnia. While some sagging is natural, indentations deeper than .75 inches can change the mattress’s structure and support.

This guide outlines some of the most advanced beds on the market. Each one is supportive, and, most importantly, designed to resist sagging and indentations. With one of these cozy yet durable mattresses, you are sure to find a restful night’s sleep and wake up ready for the day.

Best Mattresses That Won’t Sag

	Mattress	Highlights	Price (Queen)
	Amerisleep AS3	Three inches of pressure-relieving Bio-Pur® foam and dynamic zoned support	$1399
	Amerisleep AS5 Hybrid	Combines pressure-relieving Bio-Pur® and zoned pocketed coils	$1679
	Zoma Mattress	Gel-infused memory foam to keep you cool and comfortable	$699
	Zoma Hybrid	Targeted pressure relief and back support	$999
	Vaya Mattress	Plush Vaya Foam relieves pressure points without trapping heat	$599
	Vaya Hybrid	Individually wrapped spring coils keep body weight evenly distributed with causing pressure points	$699
	Purple® Original	Purple Grid™ responds immediately to pressure to reduce spinal misalignment	$1149
	Naturepedic EOS Trilux	Interchangeable layers allow you to personalize your comfort – even independently of your sleep partner	$3499
	Avocado Green	Hybrid mattress with a 3 inch latex foam comfort layer to create a medium-firm feel	$1399

Amerisleep uses the most advanced mattress technologies available. Each of their memory foam beds features a Bio-Core® support base to reduce pressure points and prevent sagging. This stable base ensures body weight stays evenly distributed, so your spine can rest in a safe, neutral position.

By using plant-based oils, Amerisleep creates a lightweight and breathable foam layer. When resting on this mattress, Bio-Pur® contours immediately to the body to keep you comfortable without heat build-up.

While the Bio-Pur® layer hugs the body’s curves, the Affinity layer with HIVE® ensures the spine remains aligned with the hips and shoulders to reduce tension. Across the surface of this foam, hundreds of cutouts respond differently to pressure. Near the lumbar spine, cutouts are closer together and firmer to keep this area lifted and supported. Under the heaviest parts of the body, the hips and shoulders, cutouts are further apart to reduce pressure points.

The three layers of the Amerisleep AS3 work together to provide sleepers with a balance of cushioning and support. The quality and construction of this bed prevent sagging so it can support you throughout many years of use.

To guarantee your satisfaction, Amerisleep offers a 20-year warranty to cover sagging deeper than .75 inches. Their 100-night sleep trial allows you to test the mattress out at home, with free shipping to anywhere in the contiguous U.S.

Unlike their memory foam beds, the Amerisleep AS5 Hybrid has a base of pocketed spring coils. These coils are wrapped in fabric for added comfort and durability. This base is also zoned to respond accurately to various levels of pressure. This design prevents coils from breaking or bending, so the mattress doesn’t develop lumps or divots. The base of the AS5 Hybrid has edge support for added durability and to reduce motion transfer.

The AS5 Hybrid has a comfort layer made with 3 inches of Bio-Pur® foam for a clean, non-toxic sleep surface. The Bio-Pur® in the AS5 Hybrid is ultra-soft, perfect for sleepers who prefer a softer mattress.

To reduce excess sinking and spinal misalignment, the AS5 Hybrid has a transition layer made with a latex-like response foam. Active Flex keeps the body lifted and aligned, so pressure doesn’t build up in the back.

With Amerisleep’s generous 100-night sleep trial period, you test out the AS5 Hybrid at home. If you aren’t happy with the mattress after breaking it in, Amerisleep will provide a full refund. Their 20-year warranty also covers manufacturing defects and sagging deeper than .75 inches.

The first layer of the Zoma features a gel memory foam with Triangulex™ technology. Near the lumbar spine, this foam is solid and stable to keep the lower back lifted. Near the joints, triangular cutouts compress quickly, so these vulnerable areas stay cushioned. The gel infusion in Zoma’s comfort foam draws moisture away from the body to prevent heat build-up.

Beneath the comfort layer is a transition foam called Reactiv™—a responsive foam with a slight bounce to reduce over sinking. This layer ensures body weight stays evenly distributed so muscles can fully relax during sleep.

The base of the Zoma features their Support+ foam—a durable base resistant to sagging and indentations. With each of their mattresses, Zoma offers a 100-night sleep trial. They also include a 10-year warranty to ensure you are happy with your new bed.

The Zoma Hybrid has a cover made with AirCloth performance fabric—a ventilated stretch-knit material for maximum breathability. Beneath the cover, Zoma’s gel-infused memory foam neutralizes body heat, so the mattress stays cool to the touch. The cutouts embedded in this foam provides just the right amount of cushioning and support to each area of the body.

Zoma’s Reactiv™ sits between the top layer and the coil base. This responsive foam prevents sinkage, so the spine remains in alignment. It’s also soft enough to cushion the joints to reduce pressure points.

The spring coil base provides a bounce many sleepers prefer. Each coil is zoned to respond accurately to pressure and prevent breakage. This base has reinforced edge support, so you can comfortably sit on the bed’s perimeter without worrying about sagging.

Like all Zoma Mattresses, their hybrid comes with a 100-night sleep trial and a 10-year warranty to cover manufacturing defects, such as sagging below .75 inches.

The Vaya has a lightweight, breathable cover to promote air circulation, so the surface stays cool. The Vaya Foam in the top layer is soft and supple for maximum comfort. However, this foam also has a buoyant quality to lift the hips and shoulders for proper alignment during sleep.

The support layer of the Vaya features a sturdy poly-foam to guard against sagging. Both foam layers of the Vaya have a CertiPUR-US® certification, ensuring they are free of harmful additives and flame retardants.

Both foam layers of the Vaya create a medium firmness—suitable for many sleep styles and couples with different needs.

For a versatile and affordable mattress resistant to sagging, the Vaya is an excellent choice.

The Vaya Hybrid has a comfort layer made with their unique comfort foam. This material responds to pressure immediately, so you stay cushioned and supported even as you change positions during sleep. The slight bounce of this foam also encourages a healthy spinal position by gently lifting the hips.

The base of the Vaya Hybrid is made with spring coils that have been individually wrapped for added comfort and durability. These coils are not interconnected the way many traditionally innerspring beds are. Therefore, they contour to the curves of the body more accurately and create very little motion transfer. The perimeter of the mattress is also reinforced with edge support for added durability and to make getting in and out comfortable.

7. Purple® Mattress – Most Unique Foam Mattress That Won’t Sag

Purple’s® original mattress features their unique Purple Grid™ and two durable, poly-foam layers. These layers provide sleepers with a comfortable and supportive surface that won’t sag or develop indentations.

The Purple® Mattress cover features their proprietary SoftFlex™—a soft stretch-knit fabric that’s perforated to promote air circulation. Beneath the cover are 2 inches of the Purple Grid™—a flexible, non-toxic polyethylene capable of withstanding intense pressure without breaking down. The Purple Grid™ is made with a Hyper-Elastic Polymer®, this buoyant yet soft grid will last at least 10 years.

Beneath the grid, two poly-foam layers provide a balance of cushioning and support. The first layer is 3.5 inches of comfort foam to provide pressure relief. Next are 4 inches of sturdy support foam to maintain the mattress’s structure and guard against sagging.

With each of their mattresses, Purple® offers a 10-year warranty and a 100-night sleep trial.

SEE ALSO: Most Comfortable Mattress

8. Naturepedic EOS Trilux– Best Latex Mattress That Won’t Sag

Selecting the right mattress without memory foam involves careful consideration of various factors, including price, materials, and comfort. Given that a significant portion of your life will be spent sleeping on it, it’s crucial to choose a mattress that not only provides exceptional comfort for restful sleep but is also crafted from durable, high-quality materials free from harsh chemicals. The Naturepedic EOS Trilux is the perfect mattress for you.

Reclining on the Naturepedic EOS Trilux mattress is an indulgence in pure comfort. The innovative design seamlessly combines plushness and support, cradling your body with a luxurious embrace. The organic cotton cover enhances the tactile experience, offering a soft, breathable surface.

As you lay down, the responsive latex and encased coils work harmoniously, delivering a balanced firmness that conforms to your body’s contours. This creates a sensation of weightlessness, relieving pressure points for a truly rejuvenating rest. The meticulous craftsmanship and commitment to organic, non-toxic materials ensure not only a delightful sensation but also a health-conscious and eco-friendly sleep environment.

Naturepedic offers a 100-day money-back guarantee. After trying out their mattresses for 100 days, Naturepedic provides a full refund if you are not happy with the bed’s comfort and quality. They also offer a 25-year limited warranty to cover manufacturing defects.

SEE ALSO: The Best Place to Buy a Mattress & 7 In-Store Myths

9. Avocado Green Mattress – Best Latex Hybrid Mattress That Won’t Sag

Avocado is another brand using durable latex foam in their beds. Their Avocado Green Mattress is a latex hybrid made with organic cotton, wool, and latex foam.

The standard version of this mattress has a 3-inch latex foam comfort layer. However, Avocado offers a Euro-style pillow top, which gives the bed a full 5 inches of organic latex foam. This topper creates a plush feel perfect for side sleepers. Without the topper, this mattress has a medium-firm feel suitable for back and stomach sleepers.

The quilted cover of the Avocado Green is breathable and ultra-soft for maximum comfort. It is made with GOTS (Global Organic Textile Standard) certified cotton and wool. The latex foam used in this mattress is also GOLS (Global Organic Latex Standard) certified. These certifications guarantee the mattress is free of harmful pesticides, making this bed perfect for those with severe allergies.

The support base of the Avocado Green features pocketed steels coils arranged in 5 ergonomic zones to keep weight evenly distributed and alleviate pressure points. Reinforced edge support around the perimeter reduces motion transfer and premature sagging.

Avocado offers a 1-year sleep trial and a 25-year warranty with each of their mattresses.

Things to Consider When Purchasing a Mattress That Won’t Sag

When shopping for a mattress that won’t sag, you should consider the materials used in construction, the type of foundation it needs, and how it supports you. Below, we break down the most important factors to consider when purchasing a new mattress.

Mattress Types

There are four different mattress types—memory foam, latex foam, hybrid mattresses, and innerspring beds. Each style features various materials that determine how quickly the mattress may sag and how it supports body weight. To help you find the best mattress that won’t sag, we outline the specifics of these four mattress types and how they measure up in terms of durability.

Memory Foam Mattresses

Memory foam mattresses respond immediately to pressure and hug the curves of the body for maximum support. Since memory foam is so soft and conforming, those living with joint pain find relief and restful sleep on a memory foam bed.

Memory foam is available in several firmness levels, from ultra-soft to firm. Therefore, sleepers can select a bed suited to their sleep style and body type. Memory foam is often used in the top layer of a mattress, while a firmer foam makes up the support base. Memory foam can also be found in the top layer of a hybrid mattress.

Memory foam mattresses are also popular because they are available at all price points, from well-made if simple budget mattresses to high-end luxury options. A high-quality memory foam mattress can last between 8 and 10 years if it is supported correctly.

Latex Foam Mattresses

Latex foam has a slight bounce because it’s made with the sap of the rub tree. Heavier individuals tend to be most comfortable on latex mattresses because they keep the body lifted rather than sunk, making it easier to change positions throughout the night.

Latex foam mattresses typically have a medium-firm feel suitable for back and stomach sleepers; however, some brands offer soft and medium comfort levels. Like memory foam, latex foam can be used in an all-foam mattress’s comfort layer or as the top layer of a hybrid mattress.

Latex foam is a very durable material, with most high-quality latex beds lasting between 12 and 15 years. The buoyant quality of latex foam prevents sagging and indentations. This foam is also resistant to dust mites, mold, and bacteria, perfect for those with allergies and respiratory conditions.

Hybrid Mattresses

Hybrid mattresses have a spring coil base and a 2 to 3-inch foam top layer. Brands can change the type of foam used in the comfort layer to adjust the bed’s firmness.

The pressure relief of foam and the bounce of spring coils make hybrids perfect for heavy people and those who prefer to feel lifted on the mattress rather than enveloped.

Most hybrids have wrapped spring coils that move independently of one another for more accurate contouring. Pocketed coil systems are also zoned to respond to each area of the body differently. Coils near the lumbar region are often thicker for added lower back support. However, near sensitive joints, springs are thinner and softer to reduce pressure points.

Depending on the quality of the foam in the top layer, the lifespan of a hybrid may be between 8 and 10 years.

Innerspring Mattresses

Innerspring mattresses have been popular since the 1950s. Although memory and latex foam beds have gained notoriety over the last couple of years, innerspring beds are still a common choice.

Innerspring beds typically have a lower price point, and they don’t retain heat the way some foam beds do. However, innerspring beds do not have the same durability as memory foam, latex foam, or hybrid mattresses.

Coils often break or bend, creating lumps, divots, and sagging. Plus, the thinner comfort layer gives these mattresses a firmer feel, causing pressure points for lightweight sleepers, side sleepers, or those with chronic pain.

If you like the bounce of coils but need pressure relief from memory foam, we suggest purchasing a hybrid mattress. You may also be comfortable on a pillow top mattress, a standard innerspring bed with a thicker foam comfort layer attached. When purchasing a pillow top bed, the topper should be at least 2 to 3 inches thick to reduce pressure points.

Mattress Firmness and Sleep Positions

Many assume softer mattresses develop sags quickly, while firm beds do not. However, the bed’s firmness does not determine the lifespan of the mattress or how quickly it may begin to sag.

Sagging is often a result of low-quality materials and poor construction. In some cases, the incorrect foundation can also contribute to sagging, which we discuss later on.

Although firmness doesn’t affect sagging, it does affect the comfort and support of the mattress. There is no standard mattress firmness scale—this rating tends to vary by brand. However, most companies use a rating scale from 1 to 10—with 1 being the softest and 10 being the firmest. Your sleep style can help you determine the right firmness.

Side Sleepers

Side sleeping puts pressure on the hip and shoulder joints, so sleepers often develop pain in these areas. The best mattresses for side sleepers have a soft to medium firmness. Softer mattresses cushion and protect the joints from pressure points, so side sleepers can wake with less pain.

Back Sleepers

Back sleepers typically prefer a firmer mattress to keep body weight evenly distributed and prevent the hips from sinking too far into the bed. The excessive sinking of the hips can force the spine to bow, putting pressure on the spine and causing the back muscles to tense. The most comfortable mattresses for back sleepers are medium to medium-firm to support the lower back and reduce sinkage.

Stomach Sleepers

Stomach sleeping causes the head and the hips to arch upward—exaggerating the curvature of the spine. An arched spine causes the muscles to tighten, leading to tension and pain in the back and neck. For this reason, we advise against stomach sleeping whenever possible. However, if you can’t get comfortable in any other position, the best mattresses for stomach sleepers are firm to keep the body in line.

Combination Sleepers

Many people change positions throughout the night, and medium mattresses for combination sleepers are usually most comfortable because they provide an even mix of comfort and support. The firmness protects the joints from pressure points when side sleeping and supports the lumbar spine when back sleeping.

Mattress Foundations

A supportive mattress foundation can prevent sagging and indentations. The list below explains the best foundation for the four most popular mattress types.

Box Springs

Innerspring mattresses are traditionally paired with box springs. Box springs were initially made with springs to absorb shock and keep weight evenly distributed. However, most box springs no longer have coils—they are now a hollow wooden box covered with fabric.

Box springs are a great way to add height to your bed, but they do not offer much support. Placing a memory foam or latex foam mattress on a box spring could damage the mattress and cause sagging. If you want to pair a memory or latex foam bed with a box spring, place a 1-inch moisture-resistant piece of plywood or a bunkie board between the box spring and the mattress.

Solid Foundations

Solid foundations provide a stable base for your mattress. They are the best foundation for a memory foam mattress because they keep body weight evenly distributed to prevent sagging.

Platform bed frames typically have a flat surface to support the mattress. You can also purchase low profile mattress foundations to pair with a bed frame or used as a stand-alone base.

Slatted Foundations

Most modern bed frames have either a solid or slatted foundation. Slats should be no more than 3 inches apart to properly support a memory foam, latex foam, or hybrid mattress. If slats are too far apart, the bed can sink, causing the foam to sag.

If the slats on your bed frame are further apart, you can place a 1-inch piece of moisture-resistant plywood on top of the slats. This barrier ensures soft foam mattresses do not sink and develop indentation.

Adjustable Bases

An adjustable bed frame allows you to change the height of your head and legs. Most modern mattresses, including memory foam, latex foam, and hybrid mattresses, can be paired with an adjustable frame. However, innerspring beds and air mattresses may not bend correctly, leading to broken springs and sagging.

Warranty and Sleep Trial

Warranty

As you can see from our list of mattresses, many brands offer generous warranties to cover sagging and indentations. However, some warranties only cover sagging up to a certain depth. Since indents below .75 inches can change the structure and support of a mattress, look for a warranty covering sagging at this depth.

When purchasing a mattress from a third-party seller, such as Mattress Firm or Amazon, be sure to read the fine print. Some warranties only apply if you purchase directly from the company. Also, warranty claims can be difficult when shopping with a third party dealer.

Sleep Trial

When buying a mattress online or in-store, your body needs time to become acclimated to the new sleep surface. An at-home sleep trial lasting at least 90 days can give you enough time to adjust to the mattress and decide if it’s right for you.

Frequently Asked Questions

How do I know if my mattress is bad?

If you notice sagging below 1 inch or if you frequently wake with aches and pains, your mattress may not be supporting you correctly. Cosmetic defects, such as rips and tears, could also indicate a worn, broken-down mattress.

Will a mattress topper help sagging?

A mattress topper cannot prevent sagging. However, if your current bed has indents forcing you into an uncomfortable sleep position, a topper can help. Memory foam mattress toppers are available in several different firmness levels, so it’s easy to find one to meet your needs. A medium to medium-firm topper works well on a mattress with an indentation or divot in most cases.

How often should you change your bed sheets?

Your bed sheets should be washed at least once every two weeks. If you tend to sweat during sleep, it is best to wash them once a week.

What mattress firmness is best for back pain?

Those with back problems are often most comfortable on a medium-firm mattress. This comfort level is ideal for keeping the hips and shoulders aligned, so the spine can rest in a neutral position. With the spine neutral, the muscles in the body can fully relax, easing tension and pain.

Does putting a board under a mattress help with sagging?

If you have a foam mattress, your bed frame’s slats should be no more than 3 inches apart. If they are further apart, a 1-inch plywood board can reduce sagging. Place the board on top of the slats to create a flat, stable surface of your mattress. Bunkie boards can also protect your foam beds when using a slatted frame.

Conclusion

Resting on a sagging mattress can leave you feeling stiff and sore in the morning. Over time, this discomfort can cause insomnia and other serious health concerns. To make the most out of your sleep, opt for a new mattress designed to resist sagging and other structural defects. A bed that evenly supports your body weight and a neutral spine will help you wake up every morning feeling refreshed.