Firm mattresses are often the best option for back and stomach sleeping, as firmer foam and spring layers help support your hips and keep your spine aligned. For the same reason, Firm and Medium-Firm mattresses are less suitable for most side sleepers, especially lighter ones, since firmer foam and spring layers prevent you from sinking in enough to relieve pressure on your arm and shoulder. That said, if you're in the heavier weight category, some firmer mattresses do offer enough pressure relief for comfortable side sleeping, while providing sturdy support for spinal alignment. You might also prefer a firmer mattress if pillowy, enveloping sleeping surfaces make you feel constricted, since you'll sink less into a firm mattress. If freedom of movement is your priority, look for a mattress that has a bouncy, responsive feel, which will help ensure you don't feel stuck in place.
We've tested over 50 mattresses, and below, you'll find our recommendations for the best Firm and Medium-Firm mattresses, including options for different body types and sleeping positions. These picks are based on our objective testing of support and pressure relief, as well as other factors like cooling, motion dissipation, and longevity. If you're looking for a supportive mattress, you can find more options on our list of the best mattresses for heavy people and best medium-firm mattresses. We also recommend the best bed-in-a-box mattresses.
We've tested over 55 mattresses. We purchase each unit independently from major retailers, just like you, to keep our reviews free of manufacturer influence. Each mattress undergoes the same tests to measure objective data on characteristics like firmness, cooling, and motion isolation, so you can easily compare results. Since we buy all our mattresses, we can tear them down layer by layer and isolate the mechanical properties of every component: quilted tops, foams, coils, and any special materials.
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Best Firm Mattress
Firmness LevelFirm (60 Pa/mm)Back Sleeping7.6Stomach Sleeping7.7Support7.7Longevity8.3Cooling8.6Motion Dissipation7.8See all our test resultsResponsiveness9.6The best Firm mattress we've tested is the Saatva Latex Hybrid. This mattress offers good support for average-weight individuals and great support for lighter people, so it's an ideal option for back and stomach sleepers in those weight categories. Heavier individuals may want more support for stomach sleeping, but its decent support makes it suitable for back sleeping. This mattress is very responsive and bouncy, making it feel easy to move around in your sleep. The latex is dense and high-quality, making it a durable mattress that will resist forming permanent impressions for longer than mattresses with lower-quality materials.
The sides of the support layer are reinforced with firmer pocket coils that don't compress easily, so you can comfortably sleep near the edge without feeling at risk of sliding off. This mattress's great cooling performance makes it a good choice for hot sleepers as well. However, its motion isolation isn't the best, so it's not ideal if you sleep very lightly. You won't feel every little move your partner makes, but you will feel bigger movements, and motion dissipates somewhat slowly, so when your partner rolls over, you may feel like you're bouncing around for a moment afterward.
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Best Upper Mid-Range Firm Mattress
Firmness LevelFirm (67 Pa/mm)Back Sleeping7.3Stomach Sleeping7.5Support7.5Longevity6.4Cooling7.5Motion Dissipation7.4See all our test resultsResponsiveness8.8The WinkBeds Plus is a solid option if you fall into the light-to-average weight range and want to spend a little less. Although this Firm mattress is marketed toward heavier people, it's not quite as supportive as the Saatva Latex Hybrid for people in that weight category. However, it's a great choice for lighter- and average-weight back and stomach sleepers, keeping the lumbar lifted and the spine aligned in this position. Its gel memory foam upper comfort layer gives it a highly contouring feel that helps with pressure relief, but you won't sink in much, and its springy, responsive feel makes it easy to move around on.
This mattress offers excellent edge support, so you can comfortably sit or sleep on the side of the bed. It delivers good cooling, but unlike the Saatva, it's not cooling enough for hot sleepers. Similarly, its motion dissipation isn't quite as good. You'll feel most movements, and while they dissipate quickly, it may not be ideal if you're easily disturbed. Unfortunately, it's not as durable either, so it'll start sagging and forming indentations sooner. That said, if you're looking for a responsive, supportive mattress in the upper mid-range price bracket, it's a great choice.
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Best Mid-Range Firm Mattress
Firmness LevelMedium-Firm (51 Pa/mm)Back Sleeping7.2Stomach Sleeping7.1Support7.1Longevity4.0Cooling7.9Motion Dissipation8.2See all our test resultsResponsiveness8.8If you prefer a mattress with a firmer feel but sleep on your side or fall into the lighter weight category, consider the Beautyrest Mattress. This Medium-Firm, mid-range mattress is plusher than the WinkBeds Plus, and you'll sink into it a little more overall. This helps it offer better pressure relief, especially for average-weight and lighter people, without having a hugging or constricting feel. Overall, it's best-suited for lighter back and stomach sleepers as well as average-weight side or combination sleepers who want a more responsive, less enveloping mattress.
Its great motion isolation makes it well-suited for sleeping with a partner. You won't feel every little move they make, and motion dissipates quickly, so the mattress doesn't wobble or bounce whenever someone shifts. The edges are very sturdy, giving you more room to comfortably share. That said, while it's cooling enough for most people, if you often sleep hot, you may want a more cooling option. Also, it uses mostly lower-quality foam for its comfort layers, which makes it more prone to forming permanent impressions sooner.
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Best Budget Firm Mattress
Firmness LevelFirm (62 Pa/mm)Back Sleeping7.4Stomach Sleeping7.6Support7.7Longevity6.6Cooling8.2Motion Dissipation8.8See all our test resultsResponsiveness9.3If you want a firm mattress for a budget-friendly price, consider the Novaform Legacy. This hybrid mattress available at Costco (U.S.) doesn't offer as much pressure relief as the Beautyrest Mattress, but its better support performance makes it a very good option for average-weight back and stomach sleepers. It offers adequate support for heavier people as well, making it a good option for side and combo sleepers in that weight category. The sleeping surface is very contouring but not enveloping. Its very responsive and bouncy sleeping surface supports your movements and prevents you from feeling stuck in place.
Otherwise, it offers good overall performance. It's cooling enough for hot sleepers and offers excellent motion dissipation, so you can sleep peacefully with a partner. Most of the foam in the mattress is dense enough to be considered good quality, which will help it resist sagging and forming permanent body impressions for longer. However, edge support is a weak point. The edges don't compress evenly when you sit or sleep on the side of the bed, which can make you feel at risk of sliding off the mattress, and reduces the comfortable sleeping surface.
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Best Cheap Firm Mattress
Firmness LevelMedium-Firm (54 Pa/mm)Back Sleeping7.3Stomach Sleeping7.5Support7.5Longevity6.0Cooling8.3Motion Dissipation8.8See all our test resultsResponsiveness8.1If you need a cheap bed that still offers a firm feel and solid support, consider the Allswell Hybrid. This inexpensive mattress is the best Medium-Firm model in the cheap category we've tested, but offers better support than many pricier, firmer options. It's impressively supportive for lighter people, so it's a good option for back and stomach sleeping for people in that weight category. While it's not ideal for average-weight or heavier stomach sleepers, its decent support makes it a good option for side or back sleeping.
Like the Novaform Legacy, this mattress is cooling enough for hot sleepers. It offers excellent motion isolation, too, so it's suitable for sleeping with a partner. Like many firmer mattresses, its comfort layers don't allow you to sink in very much, and won't offer enough pressure relief for average or lighter side sleepers. However, its very contouring sleeping surface helps add sufficient pressure relief for back and stomach sleepers. Unfortunately, it's not very durable, since it contains mostly low-quality foam, but that's not a huge surprise at this price point.
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Best Extra-Firm Mattress
Firmness LevelFirm (81 Pa/mm)Back Sleeping7.6Stomach Sleeping8.0Support8.1Longevity8.9Cooling8.1Motion Dissipation7.5See all our test resultsResponsiveness9.3If you find that some supposedly firm mattresses aren't firm enough for you, you might want the Sleep On Latex Pure Green Organic, the best extra-firm mattress we've tested. This all-latex mattress has a very firm feel. Regardless of your weight, you'll sink into it very little, and as a result, it offers impressive support for most people. Unlike many mattresses, it's a good option for heavier back and stomach sleepers, as well as average-weight and lighter ones. The flipside is that it's even less conforming than similarly priced options like the Beautyrest Mattress or WinkBeds Plus, so if you sleep on your side, it'll create uncomfortable pressure on your arm and shoulder. However, if it's a good fit for your body type and sleeping position, it's an excellent investment, since the high-quality latex layers will resist sagging much longer than lower-quality foam.
Its latex layers give it a springy, responsive feel that makes it easy to change sleeping positions, and it has very sturdy edges, making it a good option if you need a solid surface when getting in and out of bed. While you'll hardly sink into it, it's very contouring, which helps add a bit of pressure relief. Motion dissipation isn't its strongest suit, but it's still good, so you won't feel every movement from your partner. It also transfers heat very effectively, making it a great option if you sleep hot or live in a hot climate.
Notable Mentions
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Bear Elite Hybrid:
The Bear Elite Hybrid is a high-end Medium-Firm mattress that offers good support for heavier people, so it's a good option for back or stomach sleepers in that weight category, especially if you want a slightly more enveloping feel than a mattress like the Sleep On Latex Pure Green Organic. However, it's much less durable, since it includes more lower-quality foam.
See our review -
Plank Firm Luxe:
The Plank Firm Luxe is a double-sided mattress with a Firm and an Extra-Firm side. Like the also very firm Sleep On Latex Pure Green Organic, it's a good choice for most back and stomach sleepers. It's not as cooling, but it offers better motion isolation, so it's an excellent option if you sleep with a partner.
See our review
Recent Updates
May 14, 2026:
We moved the Sleep On Latex Pure Green Organic to the new 'Best Extra-Firm Mattress' category, since it's ideal for those looking for a particularly firm mattress. We also added the Beautyrest Mattress as the new mid-range pick.
Apr 09, 2026:
We added the Plank Firm Luxe to our Notable Mentions for users who want adjustable firmness. We also made edits throughout for clarity.
Feb 26, 2026:
We've updated our recommendations, adding mattresses that have recently been tested, including the Allswell Hybrid, Winkbeds Plus, and Novaform Legacy. The Bear Elite Hybrid was also added as a Notable Mention.
Jan 26, 2026:
We've reorganized the article to make recommendations based on price. The Saatva Latex Hybrid, Winkbeds The Winkbed, Beautyrest Mattress, and Beautyrest BRS900 have been added as picks.
Nov 25, 2025:
We've added picks for the best options under $1,000: the Novaform Legacy as the 'Best Firm Mattress,' and the Sealy Posturepedic Plus Mount Auburn as the 'Best Medium-Firm.' We've also named the Purple Mattress the 'Best Firm Mattress For Cooling' and moved the Sleep On Latex Pure Green Organic to the Notable Mentions section.
All Reviews
Our recommendations above are what we think are currently the best Medium-Firm mattresses and best Firm mattresses for most people. For more info on how we evaluate a mattress's performance based on your weight and sleeping position, check out the Test Bench 1.1 Changelog. We also factor in price, visitor feedback, and availability.
That said, everyone has different needs and preferences when it comes to mattresses. If none of our picks seem 'just right,' here's a list of all of our mattress reviews, sorted by firmness, so you can find your best option.