Here’s Our Casper vs. Amerisleep Mattress Comparison For 2023

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Amerisleep compares well against a range of different products on the market, but can it stand the pressure of an established authority? With years of experience, Casper is capable of capturing the tremendous variety in terms of customer demand and accommodates quickly by employing contemporary technology.

Is Amerisleep up to the challenge? Will the mattress provide a comparable level of performance, and is it capable of standing up to the other? For this review, we will focus on Amerisleep’s AS3 model and see how it compares to Casper. Let's look at the Amerisleep vs. Casper “battle” and find out!

Quick Comparison: Casper & Amerisleep

casper original foam new product image small
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  • For every sleeping position and weight class
  • More bounce for a foam bed
  • Top poly layer for quick responsiveness
amerisleep as3 image
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  • Medium feel
  • Good cradling effect
  • Proprietary Bio-Pur® foam

Comparing Materials/Construction/Layers


Amerisleep mattresses are crafted for high-end performance, and they take advantage of quality materials. There are even claims that the materials have been tested clinically to enhance your sleeping sensation. When it comes to constructing their mattresses, they take advantage of a few different types of layering. The most common technique is crafting a 12-inch thick mattress spread into three separate layers. The first layer is made out of 3 inches of Bio-Pur® foam. The second layer is 2 inches thick and is made of Affinity foam with HIVE® technology to deliver zoned support. The core of the bed is 7 inches thick, and it's made out of BioCore® foam. The breathable Refresh Cooling Cover is designed to promote cooling by drawing the heat away from your body and remaining cool for at least eight hours.

Graphic Showing Amerisleep A3 Mattress Construction Layers


The Casper stands 12 inches tall and features four layers wrapped in a durable polyester fabric.  The first layer is AirScape™, a proprietary comfort foam that gives the mattress bounce and breathability. The second layer is made up of 2 inches of Zoned Support™, a firmer transition layer in the bed's center. This layer is designed to be firmer where your heavier areas are located and softer around the shoulders and knees for pressure relief. As a result, this should provide optimal spine alignment. The bottom layer is a dense foam that gives the mattress durability, provides support, and serves as the overall foundation.

Read More: Our Top Memory Foam Based Beds

original Casper bed layers image graphics

Comparing Firmness/Support and Comfort

Amerisleep Firmness

The Amerisleep beds range from Soft to Firm, placing them between 4 and 7 out of 10, with 10 being the most firm.

The softest beds also deliver very little motion and provide a tight cradling effect which is something that you need to be a fan of in order to like (and many people enjoy it). However, they may be preferred by people who are lighter in terms of weight and who like to sleep in one sleeping position or their side throughout the entire night. Those who partake in the free faller sleeping position may want something firmer. The Amerisleep AS3 model is a medium feel, which should provide a middle-ground feel, blending soft pressure relief with sturdy support. The AS1 and AS2 are firmer, while the AS4 and AS5 will be softer.

Casper Firmness

The firmness of Casper's beds is easily defined as medium to slightly firmer. Ranking between 6 and 7 of 10, the mattress provides additional support. The 4 layers of different foam can provide a slightly expressed hug and cradling effect just like the mattresses of Amerisleep, but it is pretty minimal overall.

Additionally, you are likely to feel that the bed is firmer if you are heavier. This is because your weight will cause an additional sinkage and interaction with the inner layers of the mattress which are known to be somewhat firmer.

firmness scale for casper and amerisleep

Casper vs. Amerisleep Compared Side by Side




Material and CoverBio-Pur+, SMT, Bio-Core Support FoamPoly foam, memory foam and support foam
Height12 inches10 inches
Motion TransferVery littleMinimal
Warranty20 Years10 Years
Trial Period100 nights100 nights

Should I Buy the Casper or Amerisleep Bed?

The truth is that they are better in their respective ways, based on what you want. Both mattresses have certain specifics that you ought to consider. With this in mind, we've come to the following suggestions:

You Should Buy Casper if you:

  • Are slightly heavier and prefer to sleep on firmer beds. This can help to provide optimal spinal alignment, and it should prevent any associated back or neck pain.
  • If you prefer the free faller sleeping position. If you like to sleep on your belly, a firmer bed can provide you with additional support which is something that you should opt for. Make sure to buy an appropriate pillow if that's the case as well.
  • If you want a more responsive bed. If you prefer to be able to move on your bed without any additional hassle freely, the Casper will provide you with movability and bounce thanks to the thin top layer of responsive foam.

You Should Buy Amerisleep if you:

  • If you are a fan of medium beds. This is usually recommended to people who are less heavy in terms of weight, those with pressure reduction needs, and side sleepers.
  • If you prefer sleeping without moving. The cradling effect here is more strongly expressed, and you may find it easier to lay still and sleep in one position.

As you can see, there are quite a few things which ought to be considered. Even though we couldn't define a direct winner in this Amerisleep vs. Casper mattress comparison guide, it's worth noting that both beds may be better than the other in certain aspects. However, the choice would ultimately rest with you and your sleeping preferences and requirements.

Katie Simpson
Sleep Advisor