Our Verdict
The Casper Snow offers a decent sleeping experience. Whether you're a hot sleeper or not, it keeps you very cool as you drift off and throughout the night. This mattress also delivers excellent motion isolation, which is especially important if you sleep with a partner. You still feel larger movements, like when they roll over, but the motion dissipates quickly, so it's less likely to wake you. Unfortunately, its edge support is mediocre; sleeping near the edge makes you feel like you might slide off. It also has poor responsiveness due to its memory foam comfort layers, creating a slow feeling and a strong hugging sensation when you lie on it.
Excellent motion isolation and dissipation.
Excellent cooling.
Good choice for average to lighter back and stomach sleepers and average to heavier side sleepers.
Poor responsiveness makes it difficult to shift sleeping positions.
Edge support is just acceptable.
None of the foam used is good quality, which can cause indentations and sagging.
Not ideal for lighter side sleepers or heavier stomach and back sleepers.
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 mediocre edge support. While there's an additional polyfoam edge component built into the mattress, it compresses easily. Sitting or sleeping near the edges leaves you feeling like you could slip off. This decreases the comfortable sleeping space and makes it more difficult to get in or out of bed, especially for people with mobility issues.
Edge support is just acceptable.
The Casper Snow has poor responsiveness. Memory foam, which makes up the comfort layers of this mattress, is known for how slowly it returns to its original shape. After you compress it, this mattress takes a few seconds to recover, making it more difficult to move around and shift sleeping positions. This is quite slow, even for memory foam, and depending on your preferences, you may or may not enjoy the sluggish, hugging feeling.
Poor responsiveness makes it difficult to shift sleeping positions.
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.
Performance Usages
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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Updated Sep 11, 2025:
We recently reviewed the Helix Midnight 2024 and mentioned it in the Edge Support box for users looking for better performance in this area.
- Updated Jul 15, 2025: Review published.
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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, like the Beautyrest Silver BRS900, this mattress has poor edge support, limiting 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 allows for better-than-average motion isolation, so it's a good choice if you 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 how you feel about the slow, hugging feeling of memory foam.
If you'd like more options to consider, see our picks for the best mattresses overall.
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 Casper Snow is better than the Novaform Serafina Pearl for most people. The Casper offers significantly better motion isolation and cooling, making it a better choice for light sleepers and those who tend to sleep hot. That said, the Novaform has better edge support and a more responsive feel, so you're less likely to feel stuck in place.
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.
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, so it feels balanced and works well for a variety of sleeping styles. It's particularly well-suited to average to heavier side sleepers and average to lighter stomach and back sleepers, as lighter side sleepers may find it too firm, while heavier back and stomach sleepers may find it too soft.
The Casper Snow is a moderately 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 of some memory foam mattresses.
You sink quite deeply into this mattress, and it contours your body pretty closely, providing a cushioned, lightly hugging feeling.
This mattress isn't very responsive. This is typical of memory foam, which recovers its shape slowly after being compressed, though this mattress responds more slowly than many other mattresses that contain memory foam, like 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 or not you're a fan of memory foam, you might 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 border of the mattress, its edge support is just mediocre. When you sit or sleep near the edge, you feel like you might slip off, limiting the comfortable sleeping surface and making 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, the Helix Midnight 2024 uses tightly-coiled 15-gauge pocket springs, giving the mattress 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 not to unzip 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 and lead to premature sagging and indentations.
This mattress has 3.1" (7.9 cm) of foam above its pocket coil support system. The memory foam upper comfort layer is 1.1" (2.7 cm); this layer contours your body and relieves 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, so they can compress independently, leading to better motion isolation and contouring than other types of coils. This layer supports the heavier parts of your body, like your shoulders, hips, or lumbar, depending on your sleeping position.
The memory foam comfort layers are very soft; they contour your body closely, resulting in a hugging feeling that you may like or dislike, and relieve pressure as you shift positions throughout the night. The lower comfort foam is a bit firmer in the lumbar region, which helps provide a bit of extra support in this area, ensuring your hips or lumbar don't sink through to the pocket spring support system.
Firm pocket coils make up the spring layer of this mattress and help support the parts of your body, like the lumbar region for back sleepers, or shoulders and hips for side sleepers, that sink past the memory foam comfort layers. When combined with the soft foam layers above, this firm spring help 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 has low resilience throughout, while the lower comfort foam is zoned with a slightly more resilient foam in the lumbar region that pushes back a bit when compressed, 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.