Casper Original Mattress Review

Updated August 14, 2019

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We can buy just about anything online these days, and this includes quality mattresses at a fraction of the cost you’d pay in a retail store. You’ve probably heard of the Casper mattress. I recently got a chance to try out the queen-size Casper mattress, and I’m excited to explain how more than 30 engineering changes have resulted in a product that did exceptionally well in heat transfer.

Like a number of other products on the market, Casper incorporates measures to provide their customers that unique contour only memory foam can offer along with effective bounce to make it easy to move and get in and out of bed. We’ll be breaking down the layers to show you how it works.

While access to so many quality options access to so many quality options allows the ability to shop around for something that’ll be perfect for your needs, it also requires you to do your research so you know what you’re getting yourself into. We’ve done the hard work for you, so keep reading to see how this product holds up in a variety of testing scenarios.

Casper Mattress Specs

  Offgassing – Cleared off within a few hours

  Firmness Level (Scale of 1-10) – 6.0

  Trial Period – 100 nights

  Warranty – 10-Year Limited Warranty

Casper Cover and Layer Construction

The Casper mattress is a total of 12 inches thick and composed of four different layers. Let’s go ahead and break these layers down so you can get a good idea of how it works.

The Cover

The cover is made of polyester and spandex. These premium-grade synthetics result in a cover that’s not only very breathable but also thin enough to allow you to engage with the comfort layer very well. If you don’t weigh a whole lot, you may find it difficult to fully appreciate your mattress layers. However, the thin, stretchy, and very pliable cover doesn’t create much of a barrier to the inside of this product.

It features a simple, dotted pattern on top with grey edges. These neutral colors make it easy to work aesthetically in any setting. Unlike other thin covers I’ve experienced, the Casper doesn’t bunch up when you move around, and this has to do with the fact that it’s only a tenth of an inch thick– thin enough for engagement but thick enough to stay in place.

The Layers

Under the cover, we find the comfort layer starts off with a 1 ½ inch layer of open-cell comfort foam. This material is proprietary, so we won’t be getting into its composition. However, it works like latex to provide the bounce you need for ease of mobility. When this aspect is missing, it can be difficult to change positions or get in and out of bed, and this can cause serious problems for those who suffer from bone, joint, and muscle disorders.

The second layer makes up the remainder of the comfort zone of this product. It’s comprised of another 1 ½ inches of responsive memory foam. This layer has a slower response to pressure and works to offer pressure relief. Its strategic placement beneath the response foam allows it to do this without excessive sinkage as well as aids in breathability since memory foam has a reputation for trapping body heat.

To keep you properly supported, the Casper mattress starts with yet another 1 ½ inch layer of adaptive transition foam. It’s a little bit firmer than the first two layers, and it works, as the name implies, to transition from comfort to support. Like the top layer, the transition foam also features quick response, and I like the way Casper sandwiches the memory foam between two responsive layers that work to prevent sleepers from becoming enveloped.

Finally, we arrive at the last 5 ½ inches, and it’s made up of durable support foam. It acts as the foundation of the mattress, supporting the layers above it and giving the Casper its basic shape. This layer also provides durability to the overall structure of the mattress.

You can see in this picture how this layer combination works to provide my body contour and support. The heavier areas of my body are allowed to sink naturally into the mattress, but there’s a definite point when the support layers kick in. This layer combination can be an excellent solution for those who change positions frequently as the response foam, transition foam, and support base all work to provide the bounce you need to keep you from sinking into and getting stuck in the memory foam in the second layer.

Casper Performance

Now that we understand the inner-workings of the Casper mattress, let’s talk about overall feel for a moment. If you’re used to having memory foam in the top layer, it’s going to feel a little strange but in a good way. My body clearly sinks into the entire comfort layer.

The top layer of response foam lacks viscoelasticity and offers more resistance to my body weight, and this makes it more bouncy. However, my body still experiences the contouring qualities of the memory foam. You can see how I sink in noticeably until my body force reaches the Adaptive Transition Foam layer. I look and feel very well supported.

The Casper mattress doesn’t have a weight limit as long as you use the right base. If you carry a lot of weight and are worried about sinking too much into your support layers, Casper recommends the Casper Foundation designed to work well with their different mattress lines. It’s best to use a firm, flat, supportive base such as a platform bed or sturdy wooden slats 3-4 inches apart for longevity.

Firmness and Sinkage

Casper comes in one firmness setting, and the indentation load deflections of this product are proprietary. This information should have given us an idea of firmness expectations. However, we can still take a look at sinkage when I stand in the middle of the mattress to help you get a better understanding. On a typical medium product, I sink 6 ½ inches standing in the middle. On Casper, I sink right at six inches, making this slightly firmer than a standard medium. It’s still pretty close, though.

This firmness level works well for the average shopper. Those who don’t weigh a whole lot may find they aren’t able to engage with the second layer of memory foam as well. In this case, a memory foam topper could prove beneficial. Heavier folks who really need something on the firmer side of the spectrum may want to seek out a product that offers firmness options or features an innerspring unit.

Motion Isolation Capabilities

Sleep partners, pay attention. Even in the most secure of relationships, it’s never pleasant to be woken up in the middle of the night on a mattress that allows you to feel your partner’s every move. All-foam products typically do a pretty good job at keeping motion transfer minimal, especially those containing memory foam. In the case of Casper, I first tested it out by having someone move around rather aggressively next to me. Their movement wasn’t very disruptive, and you couldn’t see much movement in my body until they started jumping up and down. Watch our video to see for yourself. You can also watch as I drop a 20-pound medicine ball from eye-level next to a resting one of the same weight. The dropped ball experienced a decent degree of bounce for a foam product, but the other ball stays relatively still. Considering the combination of motion isolation and medium firmness, this could make this an attractive option for those with sleep partners.

Heat Transfer Capabilities

Most mattress companies take measures to help you sleep cool. Overheating while you sleep prevents you from experiencing REM sleep, and this is where the most restorative processes take place. The thin cover is naturally breathable, and the open cell structure of the top comfort foam also allows for good circulation using convection and conduction to navigate heat away from your body while the memory foam layer leverages airflow to pull heat out of the top layer.

I was pretty impressed when we took a look at the Casper mattress with our thermal imaging camera. I monitored the cooldown process after I had laid on the product for 30 minutes at a room temperature of 64 degrees Fahrenheit. Average cooldown time is right around 10 minutes, and Casper cooled off in nine, so I think Casper’s efforts to keep their product sleeping cool are pretty effective. If you sleep hot and want a product that balances contour and support, Casper’s definitely worth your consideration.

Edge Support

Sleep partners rely on the entire sleep surface of the mattress, and this includes the edge. Since products made entirely of foam sometimes struggle in this area, we took a look at how Casper holds up.

Laying on the edge, I enjoy very consistent support. I don’t feel uneven or like I’m falling out of bed. This is the case whether I lay on my side or back. Now, we often sit on the edge of the mattress. I know I do every time I fold laundry, and we all do when we get out of bed. Even with all my weight concentrated to a smaller area, the mattress still does a pretty good job at keeping me supported.

I sink into the comfort layers, but both support layers kick in to keep me from bottoming out. For an all-foam product, I think Casper holds up really well. If you carry a lot of weight and need something with a strong focus on edge support, I’d recommend looking into a product with a strong innerspring unit. However, for the average person, Casper’s edge support is definitely competitive with others of similar construction.

Maintenance, Protection, Care and Warranty

We’ve got a pretty thorough look at what the Casper mattress has to offer. This product does an excellent job in heat transfer, and the memory foam and transition layer in the core work together to provide a great balance of support and bounce. I think Casper did a pretty good job at producing a mattress suitable for the average shopper. If you think Casper sounds like it could be a good fit for your needs, check out the FAQs for some details that’ll be important once you’re a customer.

Casper Mattress Reviews and Feedback

Unboxing is pretty easy as it doesn’t weigh a whole lot. However, if you don’t want to deal with it, white glove delivery is available nationwide. Either way, you can expect the very slight off-gassing but will subside after a few hours based on experience. This is because foams are Certi-Pur US certified, meaning they are made without ozone depleters and regulated by the Consumer Product Safety Commission. They are also Greenguard Gold certified, the standard for child and baby safety in sleep products. Casper offers a 100-night sleep trial along with a 10-Year Limited Warranty.

Let’s take a look at what customers have had to say about their experiences with the Casper Mattress:


  • Good for hot sleeping
  • Surprisingly easy to move considering the memory foam
  • Good motion isolation
  • Good value


  • Some complaints of inadequate support for heavier people
  • Not the right mattress if you like the bounce of innersprings
  • No natural components

Who We Recommend the Casper Mattress For

If you’re just not sure if the Casper mattress is right for you, I understand. This is a pretty big decision as you’ll use your mattress for several years. To recap, this mattress might be the one for you if:

    You’re of average height and weight

    You have a sleep partner and need something with low motion transfer

    You sleep hot

    You need a mattress that’s easy to move

    You like memory foam but don’t like feeling stuck

Our Final Verdict

If you’re a combination sleeper who doesn’t have a favorite sleeping position, I think you’ll really enjoy the way the comfort layers work together to help you move around easily to find that perfect spot. The combination of support and pressure relief along with the medium firmness is designed to accommodate a wide range of preferences, and this makes it a great option for those with sleep partners. I’d also highly recommend Casper if you struggle with hot sleeping. If you’re particularly fond of the degree of added bounce offered by traditional innerspring mattresses or are looking for something with natural components, this probably isn’t the right mattress for you. However, the average shopper on a budget has a lot to gain with the Casper mattress.