Amerisleep and Casper are two popular mattresses on the market with different models on their belts. If you are torn between these mattresses, this guide will help you make an informed choice in the end. Read this Amerisleep VS Casper mattress comparison to know more about these two brands.

Amerisleep is the older and most famous mattress brand as it was incepted in 2007, while Casper was started in 2014. However, Casper has become very popular, and it is one of the most sought-after foam mattresses. The Casper Original is memory foam beds with a medium-firm feel. It is great for people who want a mattress that conforms and offers pressure relief. The Amerisleep mattress has the AS3 mattress, also formerly referred to as Amerisleep Liberty, as its flagship mattress. This mattress is made of memory foam, just like Casper, but it also comes with a Celliant cover.

Apart from the popular Casper mattress and Amerisleep mattresses, both mattresses have other offer models. Casper also sells Casper Essential, Casper Wave, Casper Hybrid, and Casper Wave Hybrid. Amerisleep offers the AS1(7.5), AS2(6.5), AS4(4.5), and AS5(3.5). Every Amerisleep mattress model has its firmness rating, with the AS3 being rated as 5.5.

Comparison Chart: Amerisleep VS Casper Mattress




Materials 100% petroleum-based foams, high-density memory foam, and poly foams polyfoam, memory foam, blended latex, cotton blend, 100% polyester, polyester blend, knit fabric, wool, polyester, HD polyfoam, pocketed coils, transitional polyfoam, and gel-infused transitional HR polyfoam.
Cover Celliant Polyester
Height  6 to 9-inches 11 inches
Firmness 5.5 5.5 (medium)
Certifications Certi-PUR US and OEKO-TEX A+ rating from the Better Business Bureau (BBB)
Trial period 30 nights 100 night sleep trial
Off-gassing lasts for only a few days takes more time
Price above-average Cheaper
Thickness 3-inch of Bio-Pur foam, 2-inch affinity layer, and a 7-inch bio-core layer 9.5-inch
Mattress sizes XL, Twin XL, Twin, Queen, King, California King, and Split king XL, Twin XL, Twin, Queen, King, and California King
Warranty 20 year limited warranty 10 year limited warranty
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These two mattresses are very confusing as they’ve got similar features, but they still differ in many ways. Let’s look at both of their similarities and differences so that you can have an easy time deciding.

Amerisleep VS Casper Mattress Features Comparison

Before you make a decision on whether to buy Amerisleep AS3 or Casper mattresses, you should find out how they are constructed. Both of them feature foam, but they vary in height, sleeping position, and thickness.

Amerisleep Construction

Amerisleep AS3 features Bio-Pur memory foam, affinity transition poly foam, and Bio-core support foam. These materials provide a healthy and cool sleeping environment.

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First, it has a cover infused with Celliant that is clinically proven cellar to help people with pain recover quickly. The mattress also helps the user to fall asleep 15-minutes quicker than other all-foam mattresses on the market. Another vital layer is the 3-inch of Bio-Pur foam. This layer is made of memory foam, and it conforms to your body while allowing you to cool down at the same time. The layer is also eco-friendly as it is made of plant-based materials.
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Other layers include the 2-inch affinity layer and a 7-inch bio-core layer. The Affinity layer acts as the transitional layer between the other layers, and it provides support and makes the mattress responsive. Last but not least, there is the 7-inch bio-core layer. This is the layer that supports other layers on top and makes the mattress durable. Additionally, it helps to keep your shoulders and helps in their natural position. So let’s check the constructional differences between Casper vs Amerisleep.

Casper Construction

The Casper mattress is 9.5-inches in thickness and comes with 3 comfort layers that provide better comfort and support to sleepers throughout the night. The layers include top and bottom polyfoam layers with a middle memory foam layer.

The cover of the Casper mattress is made of polyester and spandex materials. It makes the mattress breathable and comfortable at the same time. The top and bottom layers offer close body-conforming and give the mattress its medium-firm feel. The base layer is made of high-density polyfoam and supports the top layers. It also gives the mattress its shape and makes it withstand the weight.
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When compared to the Amerisleep mattress, the Casper original mattress is very light and easy to move or change on the bed.


Considering that both of these mattresses are made of all-foam, and both are not Bed in a Box mattress. It is easier for a person to think that they have the same durability. No, this is not the case, as some users prefer the Amerisleep over the Casper mattress. Also, the Amerisleep is an ideal mattress for side sleepers for excellent zoned support.

Casper mattress may hold up well, according to various users, but it is very early to come up with a conclusion concerning the durability of this mattress since it has been in the industry for less than 10-years. However, it should offer good use for more than 6 years.

On the other hand, Amerisleep has been in existence for more than 10-years, and it is easier to determine their durability. Many users of Amerisleep say that the mattress doesn’t hold up very well, and they degrade quicker. So, you should get at least 7 years of good use, which is on ace with other quality memory foam beds.


This is one of the features that the Amerisleep AS3 and Casper original share. Both of these mattresses have a medium-firm that is rated as 5.5 on the firmness scale of 1 to 10. This means that both of the mattresses can be utilized by different sleepers as they are neither firm nor very soft. Different mattress models have different firmness ratings. To know more about firmness mattress brands, you can check out the firmness mattress list.

Also, both Amerisleep and Casper have other models that users can pick from to meet their sleeping demands. For instance, Amerisleep has 5 different models while Casper has 4 models to pick from.

Temperature neutrality

Finding a breathable all-foam mattress is not easy as most of them sleep hot. Casper and Amerisleep are some of the most breathable all-foam mattresses on the market. However, Amerisleep sleeps cooler than Casper as it features a cover that is blended with Celliant. Many users say that Amerisleep is way cooler than many memory foam mattresses that they’ve used in the past.

All-in-all, these two mattresses are made to sleep cool as the Amerisleep comes with the Celliant cover, while Casper has a thin cover that is breathable and comfortable for easy circulation of air.

Motion isolation

This is a very important factor, more so for partners who are distracted in bed by their mates. A mattress with poor motion transfer can be a nightmare as a slight movement by your partner may end up waking you up.

With the Amerisleep AS3 and Casper original, you won’t face such challenges. This is because these mattresses are made of all-foam, which is good at absorbing movement. According to the owners of these mattresses, they say that both of them provide great motion isolation making the bed suitable for partners.


Besides absorbing significant motion, these two mattresses are also good at conforming to the user’s body. This is because they are both made of all-foam materials. The Amerisleep mattresses feature memory foam, while Casper comprises memory foam and polyfoam materials. As a result, Amerisleep offers more conforming than Casper.

If you want a great memory foam mattress that offers greater pressure relief, then Amerisleep will be the better mattress. This is due to the unique Celliant cover that it has and the memory foam layers. Casper has polyfoam on top and high-density polyfoam at the base, which is not very good at conforming when compared to memory foam.

Edge support

Even though Amerisleep is made up of memory foam, it has polyfoam in its edge support, making it stronger than most all-foam mattresses. This is not the same case with the Casper mattress, as it doesn’t come with any support in its edges. Therefore, it won’t be able to support your weight, and it will tend to sink after a few years of use. For the Amerisleep AS3 mattress, users have recommended it, and they say that it provides good edge support when compared to other foam mattresses.


One of the features that these mattresses lack is the bounciness and responsiveness of innerspring mattresses. This is a huge challenge if you want a good mattress for sex. At the same time, this doesn’t mean that this is not a good mattress for the bed.

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Like many other all-foam mattresses, the Amerisleep AS3 and Casper original won’t give you a bouncy or responsive surface. So, if you’re a couple looking for a bed that is very responsive and easy to change position on, then you will have to look elsewhere.


This is one of the most exceptional features of these two mattresses. If you’re a person who doesn’t like disturbance while sleeping or even changing position on your bed, then you will love both the Amerisleep and Casper mattresses. This is because both of these mattresses are virtually silent when you sit or sleep on them. With no coils or springs in its structure, memory foam alone can’t produce noise.


If you decide to purchase all-foam mattresses, this is something that you should be ready for. It is normal for memory foam mattresses to produce gas or odor when they are still new. But this is something that lasts for some days, and it will be gone. Both the AS3 and Casper mattresses produce gas for a few days when they are unpackaged. Amerisleep users say that the gas lasts for only a few days before disappearing completely. Casper takes slightly more time, but it also dissipates quickly. But if you are irritated with Off-gassing odor, you can buy any Hybrid mattress, including WinkBeds or Brooklyn Bedding Mattress.

Trial period

This is another feature that both the Amerisleep and Casper mattresses share. Casper offers a 100-nights free sleep trial period, and so does Amerisleep. Within this period, the buyer is free to try out the mattress and return it if they feel it is not offering the support and comfort that they were looking for.

However, the policy defers as Amerisleep requires the buyer to break in for 30-nights before thinking of returning, while Casper doesn’t require buyers to break in period for a full refund.

Returns and shipping

When it comes to returns, Amerisleep requires their clients to break in for 30-nights before receiving a full refund in case they decide to return the mattress. Also, Amerisleep offers a full refund without charging their clients a single penny. This includes transportation and shipping.

On the other hand, Casper also offers a full refund to the client. This includes transportation and shipping. However, mattresses bought outside the Casper online store, such as Amazon and other brick-and-mortar stores, will incur additional charges if they ask for a full refund.

Note that free shipping is offered for the US and not other areas.


Casper vs Amerisleep mattress: which brand offers a better price? The Casper mattress is cheaper than most brands such as Amerisleep, Keetsa, and American-made Wright Mattress. This does not only apply to the flagships mattresses alone but as well as the other mattresses too. As a matter of fact, the original Casper is cheaper than the cheapest Amerisleep mattress.


Casper offers its clients a 10-year warranty, while Amerisleep offers a 20-year warranty. Casper’s warranty is totally non-prorated, but it can become void if a sturdy foundation is not applied. Amerisleep has a partially non-prorated warranty that lasts for the first 10 years and a prorated warranty that lasts from year 11 to 20.

Amerisleep AS3 is for you if:

Amerisleep AS3 is not for you if:

Casper is for you if:

Casper is not for you if:

Which is better? Amerisleep or Casper Mattress?

Now that you’ve read through our detailed guide hope we’ve made your work easier and decided on the mattress you will pick. Both of these brands are very reliable with quality mattresses. They also offer a 100-nights free sleep trial period and conform to your body perfectly in order to relieve pain and aches.

Related article: Honest comparison between Casper and Tuft & Needle mattresses

Make sure that you select a mattress that meets your needs and is within your budget. If you’re on a tight budget but want a quality mattress with great features, then go for Casper. But if you’re willing to spend more to get a mattress with better breathability and a better warranty, then Amerisleep will be a great fit for you.

Still have questions after reading this Amerisleep VS Casper mattress? Comment below.

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