You can buy almost anything on Amazon, including mattresses We've scoured pages of results to find the best cheap Amazon mattresses under $400 for a queen. Our top pick is the Siena Memory Foam Mattress – it delivers ample support and great build quality at a super-low price. (A queen normally sells for $399 at Amazon.)
Now we’ll be transparent: The quality and durability of these budget models won’t be on par with the higher-end picks featured in our best mattresses of 2025 guide, but they’re still well-made beds that use CertiPUR-US foams, measure at least 10” (recommended for most adults), and come highly recommended by our expert sleep team and consumers.
The mattresses in this guide are already budget-friendly, but we track monthly mattress sales to get you the best price every time. You'll also be able to save on cheap beds during the ongoing Amazon Big Spring Sale.
Best queen mattresses on Amazon under $400 in 2025
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Best Amazon mattress under $400 overall
The Siena Memory Foam Mattress is a low-cost bed that goes above and beyond its small price tag. We rate this as the best cheap mattress overall, so we're happy to see it's now available on Amazon, allowing more shoppers to try out this bed.
Created by Resident Home – the brand behind the Nectar that's one of the best mattresses on Amazon – the Siena Memory Foam has a wealth of sleep knowledge poured into its build. And you can tell. The all-foam bed offers impressive edge support, strong motion isolation, and surprisingly good temperature regulation – three features we rarely expect to see in a cheap memory foam bed.
During our testing period we found the Siena Memory Foam mattress has a firmer feel that's best suited to back and stomach sleepers. The pressure relief is good, but there isn't the traditional memory foam 'hug'. Side sleepers seeking a sink-in feel should consider the Zinus (#2) instead.
Unusually for an Amazon mattress, the Siena also offers strong benefits. As well as a 10-year manufacturer's warranty, Siena provides a 180-night at home mattress trial. This is an opportunity to test the bed and see if it suits your sleep style without the financial commitment.
As our top choice, we think you'll be happy by the end of the trial. If not, you can return it for a refund.
- Read more: Siena Memory Foam Mattress review
Best mattress on Amazon under $400 for side sleepers
The Zinus Green Tea Memory Foam mattress is a consistent Amazon best-seller, garnering thousands of reviews – most of them positive.
It comes in four different heights, but for most adults we'd recommend at least the 10" version. That's what we tested for our review, and we found that for its exceptionally low cost it offers a good night's sleep. This medium-feel model consists of three layers of different types of mattress foam.
That upper layer is infused with green tea and charcoal to absorb moisture and neutralize odors for more hygienic sleep. (Approach these claims with a healthy skepticism – infusions are unlikely to really make a difference to how a foam performs.)
In our tests, we found it had a supportive, medium-firm feel with that classic memory foam 'hug' – you sink into this mattress, rather than lying on top of it. Like all the best mattresses for side sleepers, the Zinus has contouring cushioning at the pressure points, helping relieve pain at the shoulders and joints.
The thick foams also help trap motion, so if you share with a wriggler, this is a good budget choice. While comfortable for side sleepers, our testing panel were less impressed when front or back sleeping. The firmer Siena above is a better choice for those sleep styles.
Temperature regulation was an issue with our testers, as the mattress could get warm overnight. The Siena and the Linenspa directly below offer a cooler sleep environment, but very hot sleepers should check out our guide to the best cooling mattresses (or for a cheaper option, a cooling mattress topper).
- Read more: Zinus Green Memory Foam Mattress review
Best hybrid mattress under $400 on Amazon
This Linenspa is a hybrid mattress with a simple build that provides light pressure relief and decent temperature regulation. It's rare to find hybrid mattresses in this bargain price bracket, so if you're after a bed with a traditional feel, gentle contouring, and a wallet-friendly price, this is a good pick.
The Linenspa Memory Foam and Spring Hybrid Mattress is available in 8", 10" and 12" versions, and the deeper the mattress, the softer the sleep feel. Our expert review team tested the 8" version and found that the thinner, firmer build best suited young children and lightweight stomach sleepers.
Overall, we recommend upgrading to the 10" or 12" version if you have the budget and particularly if you're a back or stomach sleeper. These thicker designs add extra cushioning to enhance pressure relief and avoid aching shoulders (and even the 12" queen costs under $400).
The Linenspa has a contouring memory foam top layer, with another layer of foam beneath and tempered steel coils at the base. As a coil-heavy build, our testers found the motion isolation isn't ideal. If you share a bed, consider the Siena or Zinus further up the list.
Note that stock is limited for this mattress at Amazon as of late, as most sizes and depths are currently unavailable.
Best Amazon mattress under $400 for cooling
Another top-rated mattress by Amazon shoppers, the Classic Brands Cool Gel Ventilated Memory Foam Mattress comes in a range of height options to suit as many body types and sleep styles as possible. For most adults, we'd recommend between 10" and 14", but the 14" version will push you out of the $400 range for a queen (although the price is still quite reasonable at around $460). Comfort ranges from medium to medium-firm.
As its name suggests, this is an all-foam mattress that's designed to keep you cool at night. Now, you'll have to manage your expectations here — don't expect anything on the level of the best cooling mattresses in higher price brackets, especially if you deal with chronic night sweats. Still, plenty of Amazon shoppers claim the mattress does a fine job of ensuring they don't overheat.
In addition to that, fans of the Cool Gel Ventilated Memory Foam Mattress like that it's contouring but not so soft that they feel trapped inside of it. On the flip side, the biggest complaint appears to be the smell during off-gassing. This is typical of boxed foam mattresses, although experiences can vary based on how ventilated your space is. and how long the mattress has been wrapped up before unpacking it.
Best Amazon mattress for pressure relief
The FDW Store Gel Memory Foam Mattress frequently tops the Amazon best sellers list for beds, thanks to its range of options and incredibly low price. The overall build is basic; there are just two foam layers, even in the 14" version, but at this price, we wouldn’t expect much more.
Available in six different builds, ranging from 5 "to 14" tall, it uses the same design for every model. At the base, you’ll find a deeper layer of high-density foam for support. Above sits a thinner layer of gel memory foam for contouring pressure relief (and a touch of cooling, courtesy of the gel infusion). The whole thing is then wrapped in a breathable, washable cover.
The only difference between models is the thickness of the foams – the taller the bed, the thicker the foams. FDW describes it as a medium firm mattress, typically best for back and stomach sleepers. As with other beds on this list, we recommend at least 10" in height for most adults.
Customer reviews are largely positive. Most find it a good mattress, although many shoppers do stipulate that it’s a good mattress for the price. Reviews do indicate that it’s firmer than expected, which is good news for stomach sleepers, who tend to benefit from a firmer bed. The majority of negative reviews are for the thinner models, reaffirming that for the best sleep, choose the thicker builds.
Also consider
These mattresses don't quite crack our top five, but these Amazon beds under $400 for a queen are still worth considering if you're shopping on a budget.
How we test Amazon mattresses
Following our methodology, we test Amazon mattresses by having a lead reviewer plus a diverse panel of testers sleep on a mattress for at least three weeks to gauge its real-world performance. In addition to that, we run a series of objective tests to measure things like edge support, pressure relief, and motion isolation.
For Amazon mattresses we've yet to try, we rely on our testing knowledge and data from the manufacturer to come to an informed conclusion. We also vet reviews from verified Amazon shoppers as a way to spot trends among sleepers and consider mattresses that are perennial best sellers.
Best mattress on Amazon under $400: buying advice
Does Amazon sell mattresses and are they any good?
Yes, there are mattresses from top-rated, well-known brands sold on Amazon, including Nectar, Casper, Tempur-Pedic, and Linenspa.
The retail giant is a popular destination for bargain hunters, so you may be tempted to buy a mattress from a cheaper, unknown brand. Typically, we advise against buying from these lesser-known brands, as you could end up with a low-quality model that needs to be immediately replaced.
However, that doesn’t mean that the only mattresses worth buying on Amazon are from the upscale, more costly brands. Novilla and Classic Brands, for instance, may not be as well-known as Nectar, but these are considered some of the best mattresses on Amazon outright for their affordability and overall performance.
If you're opting to buy a more budget-friendly mattress from Amazon (or anywhere else for that matter), just make sure to do your homework. Know what type of mattress you need for your sleep, read the reviews (both good and bad), learn about the materials, and check the return and warranty policies.
How do you return a mattress to Amazon?
While most of our best mattress picks offer free returns within a trial period, returning a mattress to Amazon can be different – and sometimes confusing.
If the mattress is unopened, you can return it within 100 days of purchase. Just go to the Amazon Returns Center and select the 'Heavy-Bulk' option. If you’ve unboxed it, Amazon allows a refund request up to 30 days from purchase. What you'll be instructed to do with the opened mattress will vary – you may either be told to return it, keep it, or donate it.
If the mattress is from a third-party seller, there may be a different return policy, so check the Warranty and Support section of the mattress listing. Major brands with lengthy trials and warranties (such as Siena and Nectar) sell their mattresses on Amazon, and in the event of an issue, you'll want to reach out to those brands directly first to confirm your coverage.
How to choose the best mattress on Amazon under $400
Budget is obviously a factor if you're glancing at this list, but cost alone should not be a motivating factor when choosing a new mattress.
Buying a bed that doesn't mesh with your unique sleep needs will impact your health and well-being due to a lack of quality sleep. What's more, you'll end up spending more money in an attempt to land a mattress that's right for you – so it's important to get it as right as possible the first time.
When it comes to finding the best mattress on Amazon for under $400, consider the following criteria...
- Your sleep style: Most people benefit from a medium-firm mattress, but side sleepers may be inclined for something more plush to cushion their hips and shoulders. Back and front sleepers may benefit from a firmer bed that'll prevent their mid-sections from dipping.
- Your body type: Generally, a heavier sleeper with a broad build will prefer something firmer than a lightweight, petite individual who needs a softer touch. However, firmness is subjective, which is why it's important to test your new mattress if possible (more on that below).
- Your sleep concerns: You'll also have to pay mind to your primary sleep issues. For instance, do you overheat at night, or share a bed with a restless partner? Seek a model that'll best address those issues.
There are some good mattresses on Amazon, but there are also some rubbish mattresses on Amazon. If you're in the super-budget category, it stands to reason you'll need to make some compromises on quality and design. However, there are a few key things you should expect, even for a very cheap mattress. Here's what to look for:
CertiPUR-US foams
A CertiPUR-US certification confirms the foams in your mattress meet certain minimum health and environmental standards. It's standard across all mattresses, even cheap ones, and we'd consider it a red flag if a mattress' foams weren't CertiPUR-US certified.
If it's not mentioned on the Amazon product entry, check the company website, because sometimes things like that can get missed off the Amazon listing.
A depth of at least 10 inches
If you're wondering how thick your mattress should be, most adults need at least 10" in order to get the comfort and support they need. Heavier individuals (250lb+) might need something thicker, while children and petite / lightweight individuals might get away with a slightly thinner.
Warranty and returns policy
Most Amazon mattresses don't come with a proper sleep trial. While you might not be able to return your mattress just because, there should be a returns process for faults. Look for warranty information on the product listing page, as well as double-checking what happens if you need to return your mattress to Amazon.
If you're buying a name-brand like Casper or Nectar via Amazon, you might be eligible for the brand's trial period, but make sure you check and jump through the required hoops to get that activated.
Alternatively, consider investing a bit more and buying direct from a known bed brand – most of today's best budget mattresses (all under $500 for a queen size) come with a trial period of at least 90 nights.
Foam that's a least 1.8lb
Foam quality is indicated by its density, measured in pounds. Denser foams are higher quality, more durable...and more expensive. This is an important spec, but it's last on our list because it's impossible to figure out – in the vast majority of cases, brands won't publish this information.
If you can find the info, ideally you want your comfort layer (the top tier of the mattress that defines the sleep feel), you want the foam to be at least 1.8lb. According to mattress manufacturing expert Tim Dilworth, this is the minimum density to look for in a mattress, if you want it to be comfortable and to last (you'll find more insights from Tim in our memory foam density guide).
That's especially true for bed-in-a-box mattresses because the compression process puts the foams under stress, and poor quality foams likely won't recover properly.
When's the best time to buy a mattress on Amazon?
You might expect that the Amazon Prime Day deals events, a 2-day sales extravaganza exclusively for Amazon Prime members (or those taking advantage of the free trial), will be the best time to buy a mattress from Amazon. Honestly, good Prime Day mattress deals have been very few and far between.
In the 2024 events (Summer and Fall), we did see some interesting discounts, including money off Nectar and Leesa mattresses. Bedding accessories, such as mattress topper deals and pillow deals, often yielded the best savings. Interestingly, a number of bigger brands, have started running their own 'Prime Time' events to coincide with Amazon's sale.
The generic Amazon mattresses in this ranking do sometimes attract further discounts, as evident in this year's Amazon Big Spring Sale, but there's no real pattern to when we'll see price drops. Unfortunately, it's just a case of keeping an eye on the listing if you're really determined to snag a discount. We will highlight any significant offers that do arise though.
Is Black Friday the best time to buy a cheap mattress on Amazon?
Black Friday can be a good time to save on a cheap Amazon mattress, although as with Prime Day, mega savings are not guaranteed. There are a lot of mattress entries to comb through on Amazon, so we promise to do the hard work for you. If we see any deals worth your time, we'll make sure to let you know about them.
Should I buy a cheap mattress on Amazon?
Whether or not you should buy a cheap mattress on Amazon depends on what you're looking to get out of it.
For example, if you're moving into a forever home, then you might want to invest in something more durable since you'll want it to last a long time. However, if your mattress is for a seldom-used guest room or a kid's bedroom, then a cheaper mattress should suffice. If you need a mattress for your main bedroom ASAP, then a cheap mattress from Amazon will help fill that need before you can expand your budget and purchase something longer-lasting.
It's also important to keep in mind that Amazon doesn't offer mattress trials, unlike the brands themselves, which could be a downside. Mattress brands such as Nectar and Zinus offer their own trial periods. Most budget-priced mattresses don't provide such an amenity, either, regardless of where you buy.
We suggest checking the Warranty and Support section of the mattress listing on Amazon or contacting the manufacturer directly to find out if their trial and return policies apply to third-party purchases. This will help you avoid any headaches that may arise from a possible return scenario.
