The Casper Snow is a high-end hybrid bed-in-a-box mattress marketed for cooling. Its support layer is made up of individually wrapped pocket coils, while the comfort layers are made of memory foam. The manufacturer advertises three cooling features under the term Snow Technology: Heat Delete Bands, flexible strips of aluminum graphite designed to draw heat away from the body; Phase Change Materials, which absorb and release heat as they change state; and the Snow Cover, a cooling mattress cover.
Our Verdict
The Casper Snow is a good option for most side sleepers. This 'Medium' mattress offers decent body conformity for lighter people, so your shoulder will sink in enough for comfortable side sleeping. While you'd ideally want even better body conformity for side sleeping, it stands out as a good option for people in the lighter weight category. It offers great body conformity for average people and fantastic body conformity for heavier people, so it's even better at relieving pressure for side sleepers in those weight categories. Its plush, enveloping feel also helps reduce pressure on areas like your knees, and it offers solid support regardless of your weight.
Decent body conformity for lighter people.
Excellent body conformity for average people.
Fantastic body conformity for heavier people.
Plush upper comfort layers create an enveloping feel.
The Casper Snow is best-suited for light and average back sleepers. It offers fantastic support for people in the lighter weight category, so your hips won't sink in further than the rest of your body. Its upper layers have a plush, enveloping feel and provide decent pressure relief, even for lighter people. While it's not quite as supportive for people in the average weight category, it still does a great job of keeping your hips supported. It's only slightly less supportive for heavier people; while your hips will sink a little more, it's still a suitable option for back sleeping.
Fantastic support for lighter people.
Great support for average people.
Very good support for heavier people.
Heavier people may want a more supportive mattress for stomach sleeping.
The Casper Snow is best-suited for light and average stomach sleepers. The fantastic support for lighter people helps ensure your hips are supported and your back doesn't arch, and its enveloping upper comfort layers help relieve pressure on your hips and knees. While it doesn't support average or heavier people as effectively, its performance is still good enough for stomach sleeping. However, keep in mind that your whole body will sink quite a bit into the mattress, which gives it an enveloping feel, especially for heavier people.
Fantastic support for lighter people.
Great support for average people.
Very good support for heavier people.
Heavier people may want a more supportive mattress for stomach sleeping.
The Casper Snow isn't a durable mattress. It contains two layers of low-quality memory foam, which will start to deteriorate faster than higher-quality foam. As a result, this mattress will start to lose its shape and form permanent impressions faster than models made with good or high-quality foam.
None of the foam used is good quality, which can cause indentations and sagging.
The Casper Snow offers great pressure relief for most people. This mattress's soft upper comfort layers allow your entire body to sink in a few inches, providing an enveloping feel that helps relieve pressure. It also offers fantastic body conformity for heavier individuals, so you won't feel much pressure on your arms and shoulders when side sleeping. It also offers excellent body conformity for average people. Its body conformity performance for lighter individuals is only decent, so you'll feel more pressure when sleeping on your side. That said, it's still good for lighter side sleepers.
Decent body conformity for lighter people.
Excellent body conformity for average people.
Fantastic body conformity for heavier people.
Plush upper comfort layers create an enveloping feel.
The Casper Snow is a supportive mattress for most people. It's most supportive for lighter individuals, so the heavier parts of your body, such as your hips, won't sink in any more than the rest of your body, making it well-suited for back and stomach sleeping. While it's much less supportive for average people, it still does a great job of keeping your spine aligned. Support for heavier people is slightly worse, but still very good and comparable with some firmer mattresses. The mattress's lower comfort layer is zoned, with extra firmness in the lumbar area, which likely helps it provide good support for a wide range of people.
Fantastic support for lighter people.
Great support for average people.
Very good support for heavier people.
Heavier people may want a more supportive mattress for stomach sleeping.
The Casper Snow delivers an excellent cooling performance. It keeps you very cool both as you fall asleep and throughout the night, even if you sleep hot.
Excellent cooling.
The Casper Snow offers excellent motion isolation and dissipation. While you feel larger movements, they're fairly localized and don't last long, so when your partner shifts sleeping positions, you feel it in the lumbar region, but it doesn't last long enough to disturb or wake you.
Excellent motion isolation and dissipation.
The Casper Snow has poor responsiveness. Its comfort layers are made of low-resilience memory foam that doesn't recover its shape quickly after compression. It's also not very bouncy, which also contributes to making it more difficult to move around and shift sleeping positions.
Poor responsiveness makes it difficult to shift sleeping positions.
Performance Usages
Changelog
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Updated Dec 12, 2025:
We mentioned the Brooklyn Bedding Signature Hybrid in the Edge Support box for users looking for more robust support in this area.
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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.
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Differences Between Sizes And Variants
The Casper Snow hybrid mattress comes in Twin XL, Full, Queen, King, California King, and Split King, and the manufacturer describes it as having a medium firmness. We tested the Queen-sized model. See the label for our unit.
The design of this mattress is location-dependent; there's also a Casper Snow (Canadian Version), which we tested separately. If you encounter another variant, let us know in the comments, and we'll update this review.
If you come across another variant or have experience with a variant that performs differently, let us know in the comments.
Popular Mattress Comparisons
The Casper Snow mattress is a high-end hybrid mattress from Casper Sleep, which helped popularize the bed-in-a-box model. Their lineup of mattresses is split into Foams, Hybrids, and Maxes, with just one or two options in each category.
The biggest advantage of this mattress is its excellent cooling performance. It keeps you cooler than most other mattresses as you fall asleep and throughout the night, though it doesn't stay quite as cool as the Purple Mattress. On the other hand, compared to other hybrids, such as the Beautyrest Silver BRS900, this mattress has poor edge support, which limits the comfortable sleeping area. It's also notable that both of this mattress's comfort layers are memory foam. As with the Tempur-Pedic TEMPUR-Adapt, this double layer of memory foam provides better-than-average motion isolation, making it a good choice for those who sleep with a partner who tosses and turns. That said, the memory foam layers also impact the mattress's responsiveness. Like the Zinus Original Green Tea, it responds very slowly after being compressed, which you may or may not enjoy, depending on your preference for the slow, hugging feeling of memory foam.
If you'd like more options to consider, see our picks for the best mattresses and the best memory foam mattresses.
The Casper Snow and Helix Midnight Luxe 2025 have different strengths. Both have a medium firmness level, but you may prefer the Casper if you like feeling enveloped by your mattress, since it has a higher sinking level. The Casper offers much better cooling and motion isolation, but has slow responsiveness, so you may feel stuck in place. The Helix is much more responsive and has better edge support, making it easier to get in and out of bed and more comfortable to sleep near the edge of the bed.
The Boring Mattress is a better option than the Casper Snow for most people. The Boring is a more responsive mattress, with better edge support. This mattress makes it easy to move around or shift sleeping positions, and you can sleep right near the edge without feeling like you could slide off, unlike with the Casper. That said, the Casper keeps you cooler, especially at the beginning of the night. If cooling is your top priority, you may prefer the Casper, but otherwise, the Boring is a better bet.
The Nectar Premier Hybrid is a better option than the Casper Snow for most people. Both are moderately bouncy hybrid mattresses with medium firmness levels, but the Casper offers more contouring, and you sink further into it. The Nectar is a much more responsive option than the Casper, making it easier to change sleeping positions and move around. It also offers better motion isolation and edge support than the Casper, though not by much. On the other hand, the Casper Snow, true to its name, offers superior cooling. While both are good options for hot sleepers, the Casper transfers a lot more heat away from you, so if cooling is your top priority, you may want to consider it. Otherwise, the Nectar is the better bet.
You may prefer either the Casper Snow or the Saatva Rx. They have a similar medium firmness level, and both have high sinking, so you feel slightly enveloped by the mattress. The Casper utilizes memory foam for its comfort layers, which helps provide a more contouring feel and better motion isolation performance. It's also a much better choice for hot sleepers. The Saatva is much more responsive, however, so it's a better option if you don't like the slow-moving feel of memory foam.
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
The Casper Snow is a 12" (30.5 cm) mattress, so you can use standard fitted sheets.
The Casper Snow is a 'Medium' mattress and works well for a variety of sleeping positions. It's well-suited for most side sleepers, and stands out for its relatively good body conformity for lighter people. It's also a good option for back and stomach sleepers, particularly for individuals in the light to average weight categories.
The Casper Snow's body conformity depends on your weight, but you can expect at least satisfactory performance for any weight category. This 'Medium' mattress offers decent body conformity for lighter people, so if you sleep on your side, you won't feel a lot of pressure on your arm and shoulder. While you might ideally want a more conforming mattress, it's more suitable for lighter side sleepers than some 'Medium-Plush' mattresses, like the Serta Perfect Sleeper Innerspring or Sealy Posturepedic Plus.
It offers excellent body conformity for average people and fantastic body conformity for heavier people, so it'll do an even better job of relieving pressure for people in those weight categories.
This mattress is very supportive overall. It's extremely supportive for lighter people. Heavier parts of your body won't sink in any further than the rest, making it a fantastic option for back and stomach sleeping, as it keeps your hips in line with the rest of your body, which helps prevent strain on your back.
It also offers great support for average people and slightly worse but still very good support for people in the heavier weight category. Your hips will sink in slightly more, but it's still well-suited for back and stomach sleeping.
The Casper Snow is a decently bouncy mattress. It doesn't quite match the springy feeling of a classic innerspring mattress, but despite having memory foam comfort layers, it still avoids the sluggish, lifeless feeling often associated with some memory foam mattresses.
The upper comfort layers of this mattress provide an enveloping feel. The plush memory foam allows your entire body to sink in a few inches and contours closely around you. You feel like you're sleeping 'in' it, not 'on' it, and it provides a plush feel that helps with pressure relief.
This mattress isn't very responsive. This is typical of memory foam, which recovers its shape slowly after being compressed. However, this mattress responds more slowly than many other memory foam mattresses, such as the Helix Midnight Luxe. This can make it challenging to move around or change sleep positions, but it also creates a hugging sensation. Depending on whether you're a fan of memory foam, you may like or dislike this feeling.
It delivers excellent motion isolation, especially for a hybrid mattress. You feel movement mainly close to its source, for example, if your partner rolls over, you feel it in the lumbar region and less so near your head and feet. The motion dissipates quickly, so it's less likely to wake you.
Despite the additional polyfoam built into the mattress's border, its edge support is mediocre. When you sit or sleep near the edge, you feel like you might slip off, which limits the comfortable sleeping surface and makes it harder to get in and out of bed.
If solid edge support is important to you, consider an option with pocket coils reinforcing the sides. For example, both the Helix Midnight 2024 and the Brooklyn Bedding Signature Hybrid feature tightly coiled 15-gauge pocket springs, which provide fantastic edge support.
This mattress offers excellent cooling. It keeps you quite cool as you fall asleep by dissipating a lot of heat during the first hour of the night. After that, it continues to effectively transfer heat away from you, keeping you cool throughout the night and ensuring you don't wake up overheated, even if you sleep hot. This performance is especially impressive considering the mattress's memory foam comfort layers, as memory foam tends to trap heat. This is likely due to the manufacturer's cooling technologies (cooling cover, phase change material, and aluminum graphite bands) combined with the airy pocket spring support layer.
The cover is made of 69% polyester, 29% polyethylene, and 2% spandex. It has a zipper, but the manufacturer warns against unzipping it.
This mattress has additional polyfoam built into the edges, but it doesn't provide much support, resulting in edge support that is just acceptable.
The comfort layers are made of memory foam, which is characteristically slow-moving and contouring. According to the manufacturer, the upper comfort foam is coated in a phase change material, which can absorb and release heat depending on its state. Below the two comfort layers, there are three HeatDelete Bands. These aluminum graphite bands are meant to draw heat away from your body as you sleep.
Neither layer of memory foam is dense enough to be considered good quality. This can impact durability, leading to premature sagging and indentations.
This mattress features 3.1" (7.9 cm) of foam above its pocket coil support system. The memory foam upper comfort layer measures 1.1" (2.7 cm) and contours to your body, providing relief from pressure. The memory foam lower comfort layer is 2" (5 cm) thick and acts similarly, though with a bit more resilience in the lumbar region, so the heavier parts of your body stay supported.
The support layer is made of medium-soft 14-gauge pocket coils. The coils are individually wrapped in fabric, allowing them to compress independently, which leads to better motion isolation and contouring compared to other types of coils. This layer supports the heavier parts of your body, such as your shoulders, hips, or lumbar region, depending on your sleeping position.
The memory foam comfort layers are very soft, contouring your body closely to provide a hugging sensation that you may like or dislike, while also relieving pressure as you shift positions throughout the night. The lower comfort foam is slightly firmer in the lumbar region, providing extra support in this area and preventing your hips or lumbar from sinking through to the pocket spring support system.
Firm pocket coils comprise the spring layer of this mattress, providing support to specific areas of the body, such as the lumbar region for back sleepers or the shoulders and hips for side sleepers, which sink past the memory foam comfort layers. When combined with the soft foam layers above, this firm spring results in a medium mattress overall.
Both of the mattress's foam layers have low resilience, resulting in a slow-moving feeling that can make it harder to move around on the surface. That said, these layers don't perform exactly the same either. The upper comfort foam exhibits low resilience throughout, while the lower comfort foam is zoned with a slightly more resilient foam in the lumbar region, which pushes back slightly when compressed, thereby adding support in this area. While the memory foam in these layers doesn't provide much bounciness, when combined with the responsive spring layer, they still produce a moderately bouncy mattress.
The pocket springs are quite bouncy, pushing back when pressure is applied and helping to support the heavier parts of your body. Considering the foam layers' low responsiveness, most of the mattress's moderate bounciness comes from this layer.