What's the best firm size mattress in 2024? I’m a mattress tester — here's my top picks

The Saatva Classic photographed on a white wooden bedframe in a blue bedroom surrounded by tall green house plants and a bookcase shelving unit containing pillows, blankets and books
(Image credit: Future)

As a mattress tester with my own sleep needs — namely a sore lower back — I know firsthand how important it is to choose a mattress with the right firmness level. The best firm mattresses provide unparalleled comfort and support for back and stomach sleepers, heavier people, and those who experience joint-related pain.

Several of the top recommendations in our guide to the best mattress for all sleepers offer customizable firmness options, including firm. However, a firm mattress won’t be the right fit for everyone. At the bottom of this guide, you’ll find our advice on who would benefit from a firm mattress, and who should opt for something softer. 

Our team of expert mattress testers, certified sleep coaches, and I have collectively reviewed and slept on scores of the latest mattresses so you can trust us to help you find the right firm bed for your needs and budget. After re-testing it, we now rate the Saatva Classic as the best firm mattress of 2024, thanks to its blend of sturdy support and targeted pressure relief that suits all sleeping positions. 

You’ll also find our expert analysis of six other recommendations to choose from, including our latest addition, the Stearns & Foster Estate, a comfortable from the get-go firm mattress with a luxurious Tempur-Indulge memory foam layer for deep pressure relief. If you are shopping for a new firm mattress, you’ve picked an excellent time. This year's Cyber Monday mattress sales are offering huge discounts on our top recommended brands. Read on for our expert-selected firm mattress recommendations, and what to pick up in the biggest sales of the year. 

1. The best firm mattress of 2024

A luxurious firm mattress, with top marks for lumbar support

Specifications

Type: Innerspring hybrid
Firmness (1-10): 3, 5-7, or 8
Height: 11.5 or 14.5"
Trial length: 365 nights
Shipping: Free in-home delivery; $99 returns fee
Warranty: Lifetime
Price bracket: Premium

Reasons to buy

+
Customizable height and firmness
+
Specialized lumbar support
+
Very sturdy edges for sitting

Reasons to avoid

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Not for sleepers over 300lbs
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Some mild motion transfer
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Costs $99 to return it

Quick summary

The Saatva Classic is the best mattress we've tested so far. It's our top firm mattress recommendation for most sleepers due to its blend of effective pressure relief, superb levels of comfort, ability to ease back pain and the fact that the mattress doesn't retain heat.

This high-end, hybrid innerspring mattress comes in three comfort levels, with two suitable for consideration here: Luxury Firm (5-7), and Firm (8). Our testers slept on a Luxury Firm version and rated it between a 7 and 7.5. It earned high marks for its sheer comfort and quality, as well as its effectiveness in reducing back pain, likely due to the specialized lumbar support system.

It's prone to a small amount of motion transfer, which makes it a good option for anyone who likes a little bounce, but if you're a particularly light sleeper who shares a bed, you could consider the Winkbed (#1) or DreamCloud (#4) instead, which are better at absorbing motion.

2. The best budget firm mattress

A firm all-foam mattress that costs only $399 for a queen

Specifications

Type: Memory foam
Firmness (1-10): 6.5 (we rate it between 8-9)
Height: 10"
Trial length: 180 nights
Shipping: Free shipping and returns
Warranty: 10 years
Price bracket: Budget

Reasons to buy

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Firm, flat surface for stomach sleeping
+
Sleeps cool for a budget foam bed
+
180-night sleep trial

Reasons to avoid

-
Minimal hug for side and back sleeping
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Long-term durability TBD

Quick summary

The Siena Memory Foam mattress tops our best affordable mattress guide for its supportive build and generous extras. It outperforms other models we've tested in the sub-$500 range in almost every way. The jury is out on how it'll endure many years of use, although our review model was in fine shape after a month of testing.

It lands a spot on this list for being much firmer than advertised. Our testers rated it an 8-9 out of 10 on the firmness scale, and several Siena customers commented on this bed's extra-firm surface (for better or worse). It won't hug you like other beds that feature in our best memory foam mattresses as the pressure relief is minimal. The Siena should be comfortable for stomach sleepers and back sleepers who like to remain as flat as possible.

3. Best Luxury firm mattress

The best firm mattress to recreate 5* hotel luxury in your bedroom

Specifications

Type: Hybrid
Firmness (1-10): 1-2 or 7-8
Height: 15"
Trial: 90 nights
Warranty: 10 years
Price bracket: Premium

Reasons to buy

+
Comfortable to sleep on
+
Excellent edge support
+
Two firmness options
+
Upgradable to a pillow top
+
Free premium delivery service

Reasons to avoid

-
An indentation formed on our model
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Pillow top isn’t very 'pillowy'

Quick summary

If you’ve ever wondered what mattresses hotels use, Stearns & Foster is the company that’s behind the world famous Ritz-Carlton Bed. On the brand’s consumer side, the Stearns & Foster Estate is one of the brand’s cheaper options, although ‘cheap’ is very relative here. These are premium mattresses but, if you’re in the market for a truly luxurious bed, the Estate is hard to beat.

Like the Saatva Classic at number one in our list, the Stearns & Foster comes in a number of firmness options. You’ve got three standard firmness options to choose from - soft (3/10), medium (6-7/10) and firm (9/10). For an extra chunk of money you can also add in either a soft pillow top (2/10) or a firm pillow top (8/10). The pillow top gives the mattress a slightly more cushioned feel, while the standard top is more responsive. Sleepers looking for a firm mattress will really only want to consider either the firm or the pillow top firm options.

4. The best firm mattress for back pain

The best firm mattress for back pain, the WinkBed is comfortable, customizable, and supportive

Specifications

Price: Upper mid-range
Type: Hybrid
Best for: All sleepers; back pain; heavier bodies
Firmness: Soft, medium-firm, firm, very firm
Sleep trial: 120 nights
Warranty: Lifetime
Shipping: Free

Reasons to buy

+
Four firmness options
+
Targeted relief and support
+
Absorbs motion well

Reasons to avoid

-
Less luxe than top rival Saatva
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$49 to exchange (but free returns)

Quick summary

The WinkBed is a luxury innerspring (and one of our top-rated hybrid mattresses), with comfortable cushioning and zoned support. It performed well in all our tests, but we particularly recommend it to those suffering with back pain, and you'll find the Winkbed in our best mattress for back pain guide, thanks to its targeted lumbar support and 3 Step Back Relief System.

The Winkbed shares many of the same characteristics as its closest rival, the Saatva Classic (#1 in this guide). It's a mattress in a box (so it's delivered, rolled up, to your door) rather than a traditional mattress, like the Saatva. It's also around $300 dollars cheaper than the Saatva, and offers four customization options as opposed to the three from Saatva.

It also caters to people over 300 lbs with its firmest option, the Winkbed Plus , making it a great option for heavier people. In fact, the WinkBed is our top pick in our best mattresses for heavy people, thanks to the stellar support offered by the Plus version.

Our reviewers slept on a Luxury Firm version of the Winkbed (6.5/10 on the firmness scale) for three weeks and rated it highly for lumbar support and spine alignment. If you prefer a firmer mattress, try the Firm (7.5/10) or Plus (8/10) versions — the Winkbed comes with a 120-night trial period, and returns are free. However, exchanges will incur a $49 fee.

5. The best cooling firm mattress

A firm mattress that won't leave you hot and bothered

Specifications

Type: Hybrid
Firmness (1-10): 2-4, 4-6, 7-8
Height: 13"
Trial length: 120 nights
Shipping: Free shipping ($99 return fee)
Warranty: 10 years
Price bracket: Upper-mid / premium (with pillow-top)

Reasons to buy

+
Variable firmness and optional pillow-top
+
Exceptional cooling prowess
+
RV and non-standard bed sizes

Reasons to avoid

-
Poor motion isolation
-
Slippery top surface
-
$99 return fee

Quick summary

The Brooklyn Bedding Aurora Luxe is built for cooler sleep. It comes in soft (2-4), medium (4-6), or firm (7-8) with an optional Cloud Pillow-Top. Two RV mattress sizes are available (RV king and RV bunk), as are the less common short queen and split California king sizes.

Our testers thought the Aurora Luxe's cool-touch GlacioTex cover did its job well, although the slick finish of the material caused our fitted sheets to slide. Adding the pillow-top upgrade will push the mattress into the premium price bracket, but we believe it's worth the investment if you want extra cushioning for your joints.

6. The best firm mattress for side sleepers

A firm mattress that doesn't compromise on pressure relief

Specifications

Type: Hybrid
Firmness (1-10): 6.5 (we rate it an 8)
Height: 12"
Trial length: 365 nights
Shipping: Free shipping and returns
Warranty: Lifetime
Price bracket: Mid-range

Reasons to buy

+
Firm without triggering pressure points
+
Very good motion transfer
+
Fantastic value for a hybrid

Reasons to avoid

-
Edge support could be better
-
Too firm for smaller sleepers
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No customization

Quick summary

For side sleepers who don't want a super-plush bed, our firm mattress pick is the DreamCloud. We rate it an 8 out of 10 on the firmness scale, which is several notches above DreamCloud's assessment of 6.5. The consensus among our team is that it's supremely supportive with loads of pressure relief for the hips, lumbar, and shoulders. You'll need time to break it in if you're on the smaller side, though.

The DreamCloud is one of the most affordable luxury mattresses on the market. If you can't quite swing a WinkBed (#1) or Saatva Classic (#2), it's a solid alternative at a stellar price. After regular sales, a queen-sized DreamCloud mattress won't set you back more than $700. You'll forfeit the chance to customize your bed feel but you'll still avail of a 365-night sleep trial and a lifetime warranty.

7. The best firm mattress for back sleepers

An organic mattress that's plenty supportive for back sleepers

Specifications

Type: Hybrid
Firmness (1-10): 7
Height: 11"
Trial length: 365 nights
Shipping: Free shipping ($99 return fee)
Warranty: 25 years
Price bracket: Premium

Reasons to buy

+
Great back and neck support
+
Above-average weight capacity (700lbs)
+
Breathable, organic materials

Reasons to avoid

-
Too solid for side sleeping
-
A heavy mattress to set up
-
Costs $99 to send back

Quick summary

We consider the Avocado Green the best firm mattress for back sleepers — we've also crowned it the best organic mattress you can buy right now. Instead of a memory foam comfort layer, you'll find 2-inches of dense, firm Dunlop latex with minimal contouring. There's also a zoned support core of pocketed coils to provide varying levels of support for different areas of your body. For our back-sleeping lead tester, this yielded a balanced, comfortable experience.

The Avocado Green is also great for hot sleepers thanks to the natural breathability of its organic materials (latex, wool, and cotton). The combination of Dunlop latex and coils makes it a durable mattress for heavy people, with a weight capacity of 700 pounds. However, if you occasionally sleep on your side, the Avocado might feel too firm. (You can add a box-top or pillow-top for an additional fee, but it's costly.)

How we test the best firm mattress

The Tom’s Guide mattress review process is editorially independent and not influenced by any third parties. Our expert mattress testers sleep on each mattress for at least three weeks (roughly how long it takes for your body to get used to a new mattress) and spend hours scientifically testing the performance of each product.  

Mattress firmness is subjective, so each lead reviewer also forms a trusted and experienced testing panel made up of people with different sleep needs and body types. We have side sleepers, back sleepers and stomach sleepers, with lighter, average and heavier bodies, who rate each mattress using a specific set of performance criteria. 

Together, these processes enable us to produce accurate, well-balanced and data-backed mattress reviews, to help you decide whether the mattress you like the look of is the best choice for you. Read our full mattress methodology for more info.

Alison Barretta
Alison Barretta

Alison is one of the main mattress testers at Tom's Guide and an experienced sleep product tester in general. Alison has reviewed every type of mattress you can buy online, including firm mattresses, memory foam, hybrid and cooling mattresses. She loves using her review knowledge to help readers choose a great new mattress to enhance their sleep.

Best firm mattress FAQs

Do firm mattresses last longer?

Firmer mattresses can benefit your both your back and your bank balance, as firmer mattresses tend to last longer than softer ones. As opposed to softer mattresses which allow sleepers to sink further into its supportive layers, a firm mattress is designed to keep the sleeper laying on top of the mattress. This protects the integrity of your mattress, helping it last longer. 

However, as with all mattresses, how long your mattress lasts ultimately depends on your weight, sleep position and how well you look after it, especially if you have a memory foam mattress. Memory foam can be damaged by extreme heat, direct sunlight and liquid, so you’ll need to make extra effort not to accidentally damage your memory foam mattress

Who should sleep on a firm mattress?

Wondering if a firm mattress is right for you? Dr. Grant Radermacher, owner of Ascent Chiropractic in Brookfield, WI, recommends a firm mattress for the following cases:

1. People with joint-related back pain
According to Dr. Radermacher, "A firm mattress provides the support your spine needs to maintain proper alignment, which can help reduce pressure points on your lower back and alleviate spinal facet and/or sacroiliac pain." Learn more about the best type of mattress for back pain.

2. Back and stomach sleepers
Dr. Radermacher says that for back and stomach sleepers, "a firmer mattress can help support the natural lordotic (forward) curve of your lower back, keeping excess stress off some of the more sensitive structures in your spine." Strict side sleepers should seek a medium-soft mattress that'll better contour the hips and shoulders – check out the best mattresses for side sleepers, or read more about what happens to your body when you sleep on your back, on your stomach, or on your side

3. Overweight or obese individuals
"For those on the heavier side, a firm mattress can help distribute their body weight more evenly across the mattress, minimizing stress on the joints in the spine and pelvis and resisting mattress sagging over time," says Dr. Radermacher.

Is a firm mattress good for back pain?

According to medical experts we've consulted, a firm mattress isn't always the best for back pain. Sleepers who weigh under 130lbs may not get the proper amount of support and cushioning they need from a firm mattress. Strict side sleepers may also feel more at ease with a softer mattress to cushion their shoulders and hips. 

Who should sleep on a firm mattress for back pain? Sleepers over 230lbs are usually good candidates for a firm or extra-firm sleep surface to alleviate their back pain. Stomach sleepers should also seek a firm or extra-firm mattress, although experts generally don't recommend this sleeping position for back pain.

That said, firmness and comfort are subjective. The best mattress for back pain is one that alleviates your discomfort so you can sleep through the night and wake up refreshed. What that'll be for you will depend on your preferences and body type. The source of your pain also plays a role; sleepers with lower back pain tend to fare well with a firmer mattress.

While a firm mattress for back pain could help you sleep better, it's important to address the root cause and consider other lifestyle changes. Talk to your primary care physician or another licensed medical professional to address particular sleep or health concerns.

Firm vs orthopedic mattresses: Key differences

An orthopedic mattress is designed to alleviate back and joint pain by ensuring proper alignment and ample pressure relief. Depending on whom you ask, there's no discernible difference between an orthopedic mattress and a standard mattress, but an orthopedic mattress generally runs medium-firm to firm so it can provide the necessary support.

If you need to buy a mattress for medical reasons, you might not have to pay for it – see what type of mattresses are covered by Medicare. However, if you don't qualify for this benefit, you can still save by browsing today's best mattress deals below.

Will firm mattresses get softer?

All mattresses soften and sag over time, with the average lifespan of a mattress being eight years depending on its build quality and the materials used to make it. A firm or very firm mattress is purpose built to deliver a harder sleeping surface for longer. While you can soften this to an extent by using one of the best mattress toppers for changing the feel of your bed, it will take quite some time for a firm feel mattress to soften up. 

It takes your body around 30 nights on average to get used to a new mattress, so after this time you may feel as though your firm mattress is softening but really your body is simply adapting to it. 

Are firm mattresses good for side sleepers?

Side sleepers need a mattress that won't trigger the pressure points in their shoulders, hips, and knees. In most cases, firm mattresses are discouraged for side sleeping as they don't offer enough contouring. However, there are exceptions, such as the DreamCloud, which we consider the best firm mattress for side sleepers who don't want anything too plush.

The amount of pressure you put on your sleep surface through your body weight will influence how soft or firm your mattress should be. If you weigh less than 130lbs, a firm mattress is unlikely to give you the amount of relief you need to sleep comfortably. On the other hand, side sleepers who weigh over 230lbs might find a firm mattress provides the balance of comfort and support they need. For those in between these weight ranges, a medium to medium-firm bed could work best.

If you're mattress shopping but don't know where to begin, knowing how to choose a mattress for your sleep position will help you narrow down the field. 

Alison Barretta
Freelance reviewer and writer

Freelance writer and editor Alison is an expert mattress tester for Tom's Guide, and hails from Philadelphia, USA. Alison has reviewed a wide range of mattresses, pillows and other sleep accessories for Tom's Guide, putting the latest hybrid, memory foam and cooling mattresses from Casper, Nectar, Awara, Brooklinen and other leading brands through their paces. Alison has been sharing buying advice and retail news for over a decade. When she isn't reviewing mattresses, other home products or hunting for great deals to save you money, Alison can be found teaching/training in martial arts, fawning over skincare, and indulging in her quarantine-borne hobby: cooking.

With contributions from