The Sleep On Latex Pure Green Organic is a mid-range foam bed-in-a-box mattress. It only includes latex foam, with a firm latex serving as its support layer and a softer latex for its comfort layer. The mattress cover is made of wool. The manufacturer advertises that it only uses organic wool, cotton, and latex.
Our Verdict
The Sleep On Latex Pure Green Organic isn't a great option for side sleeping, regardless of your weight. It's best-suited for heavier side sleepers, whose shoulders and arms will sink into it more, which helps relieve pressure. However, its body conformity is still only decent, and you may want a softer mattress for side sleeping. Similarly, it offers mediocre body conformity for average people and poor body conformity for lighter people, so it'll put uncomfortable pressure on your arm and shoulder if you sleep on your side.
Decent body conformity for heavier people.
Highly contouring comfort layer helps with pressure relief.
Poor body conformity for lighter people.
Mediocre body conformity for average people.
The Sleep On Latex Pure Green Organic is well-suited for average and heavier individuals who sleep on their backs. It offers impressive support for people in both weight categories, so your hips will stay in line with the rest of your body when sleeping on your back. While it has a firm feel and most people won't sink much into it at all, its upper comfort layer is very contouring, which helps relieve pressure around your hips and lower back. It offers similar great support for lighter side sleepers, but since lighter people will compress it less and sink into it less, you may find it feels a little overly firm, even with the highly contouring latex comfort layer.
Impressive support for people in all weight categories.
Poor body conformity for lighter people.
The Sleep On Latex Pure Green Organic is well-suited for most stomach sleepers. It offers very similar great support for people in the lighter, average, and heavier weight categories, which helps keep your spine in line and prevents your back from arching when sleeping on your stomach. It's not ideal if you want an enveloping feel, and lighter people, especially, may find it feels overly firm. However, its weaker pressure relief is less of an issue for stomach sleeping, so it's still a good option for lighter individuals.
Impressive support for people in all weight categories.
The Sleep On Latex Pure Green Organic is a durable mattress. All of its layers are made of dense, high-quality latex and will resist sagging and forming indentations for much longer than lower-quality foams.
Uses only durable, high-quality latex.
The Sleep On Latex Pure Green Organic has a very firm feel and doesn't provide great pressure relief for anyone. It performs best for people in the heavier weight category, who will compress it enough for decently comfortable side sleeping. However, it only offers passable body conformity for average people and has a poor performance for lighter people, so you'll feel a lot of pressure on your shoulders and arms if you sleep on your side. Its highly contouring latex comfort layer helps relieve pressure overall, but doesn't allow you to sink into it very far, which also hurts its pressure relief performance.
Highly contouring comfort layer helps with pressure relief.
Poor body conformity for lighter people.
Mediocre body conformity for average people.
The Sleep On Latex Pure Green Organic offers great support regardless of the weight category you fall into. It performs slightly better for lighter individuals and slightly worse for heavier individuals, but overall, it's impressively supportive for all weight categories. This helps make it well-suited for back and stomach sleeping, as it keeps the heavier parts of your body, such as your hips, from sinking too far, thereby maintaining spine alignment, which is crucial for comfortable back and stomach sleeping.
Impressive support for people in all weight categories.
The Sleep On Latex offers a great cooling performance. It transfers a significant amount of heat away from your body in the first hour of the night, allowing you to stay cool as you fall asleep. After that, this mattress continues to dissipate a lot of heat throughout the night, so you don't wake up overheated. Even if you sleep hot, this mattress should suit your cooling needs.
Great cooling performance.
The Sleep On Latex delivers good motion isolation and dissipation. When your sleeping partner tosses and turns, you feel it mainly in the lumbar region and just a bit near your head and feet. Motion dissipates quickly, so you're less likely to be woken up by a partner shifting sleeping positions or a pet jumping on the bed.
Good motion isolation makes your partner's movements less likely to disturb you.
The Sleep On Latex is a superbly responsive mattress. It bounces back almost instantly after being compressed, which helps avoid any feeling of being stuck in place. Its somewhat bouncy feel also makes it feel easy to change sleeping positions.
Fantastic responsiveness makes it easy to switch sleeping positions.
Performance Usages
Changelog
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Updated Dec 12, 2025:
We rewrote portions of the review to align with Test Bench 1.1, including adding text to the new test boxes and for the newly added verdicts.
- Updated Dec 12, 2025: We converted this review to Test Bench 1.1. We've added new tests, including Body Conformity, Support, and Comfort Layers Envelopment, and also added scoring to the Bounciness test. Our usage scores have also changed, with new usages 'Side Sleeping,' 'Back Sleeping,' and 'Stomach Sleeping' replacing the 'Sleeping' verdict. We've also added 'Pressure Relief' and 'Support' performance usages. You can find more details in the full changelog.
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Updated Oct 06, 2025:
We rewrote portions of this review to align with Test Bench 1.0.1, which adds a Longevity verdict and a score to the Foam Layer Mass Density box for users interested in the mattress's durability.
- Updated Oct 06, 2025: Converted this review to Test Bench 1.0.1. We've added scoring to the Foam Layer Mass Density section and a new 'Longevity' performance usage. Read more about it in our Changelog.
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Differences Between Sizes And Variants
The Sleep On Latex mattress comes in Twin, Twin XL, Full, Queen, King, and California King sizes. There are two firmness options: Medium and Firm. We tested the Queen-sized model in Medium, and you can see the label for our unit.
If you come across another variant or have experience with a variant that performs differently, let us know in the comments.
Popular Mattress Comparisons
Sleep On Latex focuses on natural products. In addition to their mattress, they offer mattress toppers and pillows made from natural latex, organic cotton, and organic wool. The Sleep On Latex Pure Green Organic is the only mattress they offer. It stands out for its construction; aside from the cover and fire barrier, this mattress is made entirely from latex foam. Like the Saatva Latex Hybrid, this mattress is highly responsive; It springs back instantly after you compress it, which is characteristic of latex. On the other hand, its motion isolation performance lags behind options like the Tempur-Pedic TEMPUR-Adapt, which uses a mix of polyfoam and memory foam in its construction.
This mattress also has outstanding edge support, nearly matching the performance of the Beautyrest Silver BRS900. It's very cooling as well, and while it can't compete with the Purple Mattress or the Casper Snow (Canadian Version), it performs well enough to keep even hot sleepers cool. Overall, if you enjoy the feeling of latex, it's a solid option.
If you'd like to see more options, check out our picks for the best mattresses and the best firm mattresses.
The Sleep On Latex Pure Green Organic performs better than the WinkBeds The WinkBed in most aspects. The Sleep On Latex offers significantly better edge support, which increases the comfortable sleeping surface, and much better cooling, making it more suitable for hot sleepers. It's also more responsive, which makes it feel easier to move around in your sleep. That said, the Winkbed has better motion isolation, so light sleepers might prefer it.
We've recently started testing mattresses. We use objective data and repeatable testing for key characteristics like firmness, cooling, and motion isolation, to ensure each mattress gets the same treatment. Since we buy all of 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. Our approach gives us unprecedented insight into how each product design decision contributes to a mattress's overall performance and feel, and allows us to tailor our results to different body types and sleeping positions.
Test Results
It's advertised as an 8" (20.3 cm) mattress, and ours measured a little shorter, so you can use standard fitted sheets with some room to spare.
Latex is a very heavy material, so this mattress is also quite heavy. It doesn't retain its shape, either, making it very difficult to move. In fact, we damaged our unit while trying to move it. We recommend moving this mattress with a minimum of two people.
This is a firm mattress. It's a good fit for average and heavier back and stomach sleepers, but lighter people and side sleepers may need a softer option.
This mattress lacks good body conformity for individuals across all weight categories. This 'Firm' mattress won't compress enough under most people's shoulders for comfortable side sleeping. That said, it has satisfactory body conformity for heavier individuals, so your shoulder will sink in enough to relieve some pressure. However, you may ideally prefer a more conforming mattress for side sleeping. It has mediocre body conformity for average people, who will also want a plusher mattress for side sleeping. It's even worse for lighter side sleepers, as its poor body conformity for people in that weight category means you'll feel uncomfortable pressure on your arm and shoulder.
The Sleep On Latex Pure Green Organic offers impressive support for most people. Regardless of your weight category, it does a great job of supporting the heavier parts of your body, like your hips. It performs best for people in the lighter weight category, but only has marginally worse performance for heavier individuals. Therefore, it helps keep your hips from sinking in too far when sleeping on your back and prevents your back from arching when sleeping on your stomach.
This mattress is moderately bouncy. Latex tends to have more 'push back' than polyfoam or memory foam, making it a good choice if you like the feeling of a springy, bouncy mattress.
The lighter parts of your body won't sink very deeply into its upper comfort layer. The latex is very contouring, however, so it molds around you and more of the sleeping surface is in contact with your body, which creates a slightly hugging feel and helps with pressure relief.
It has fantastic responsiveness. When you compress the mattress, it recovers its shape almost instantly. It's easy to move around and switch sleeping positions.
This mattress has very good motion isolation. You feel movement mostly near its source. For example, when your partner rolls over, you feel it mostly in the lumbar region and less at your head and feet. The motion dissipates quickly, so it's not likely to wake you up.
This mattress has superb edge support. Although there's no additional edge component built in, the sides don't compress easily. You can sit or sleep near the edge without feeling like you might slip off, and it's very easy to get in or out of bed. Even compared with models that feature pocket springs built into the edges, like the Nectar Classic Hybrid, the Sleep On Latex performs better in this area.
It offers impressive cooling performance. Each layer of latex foam is perforated, which helps with breathability and allows heat to dissipate more quickly. The manufacturer also says that the wool batting (used as a fire barrier) helps keep the mattress's surface cool. In practice, this mattress sleeps quite cool, especially for a foam mattress. It keeps you fairly cool while you fall asleep and dissipates a lot of heat throughout the night, so you don't wake up overheated. While there are options that are even more cooling, this mattress should help keep you cool, even if you tend to sleep hot.
The cover is made of organic cotton. It's removable, and although it's not machine washable, it can be dry cleaned.
Although it lacks an additional edge component, this mattress still offers outstanding edge support. This fantastic performance is likely due to the dense, responsive nature of latex foam.
This mattress contains three layers of latex foam. Latex has a bouncy, resilient feel, providing a good balance of pressure relief and support.
This mattress's layers are all made of dense, high-quality latex, which suggests the mattress will resist sagging or forming indentations for much longer compared to mattresses that use low-quality foams. The foam is denser and more durable than the latex layers found in some other mattresses, such as the Saatva Latex Hybrid, which includes a layer of good-quality, but not high-quality, latex.
This mattress is 7.6" (19.3 cm) tall and contains only latex foam, apart from the cover and wool fire barrier. The upper comfort foam is 1.8" (4.6 cm) tall and provides contouring and pressure relief. Also at 1.8" (4.6 cm), the transition layer provides support for the more recessed parts of your body and ensures you don't sink too far into the mattress. The support layer is 4" (10.1 cm) thick, offering support for the heaviest parts of your body and a sturdy base for the mattress overall.
The layers in this mattress get progressively firmer towards the support layer, with each layer contributing to both pressure relief and support. The upper comfort layer features the softest foam in the mattress, which contours your body closely and relieves pressure points. Below that, the transition layer is a bit firmer. This layer helps evenly distribute your body weight, ensuring you don't sink too deeply into the mattress. The support layer is the firmest overall. It provides a stable foundation and support for the heaviest parts of your body, such as the hips or lumbar region, depending on your sleeping position. Together, these layers work to alleviate pressure, support your body, and maintain spinal alignment.
The layers of this mattress are all very resilient and bounce back when pressure is applied, which is expected of latex. This gives the mattress a responsive, bouncy feel despite not having a spring layer and makes it easier to move around on the mattress and change sleeping positions. The upper comfort foam is quite resilient, offering a buoyant sensation that makes you feel like you're sleeping more 'on' than 'in' your mattress. Below that, the transition foam has the same resilience as the layer above, ensuring that you don't sink through to the support foam, which has the highest resilience and helps give the mattress its moderate bounciness.