Casper vs. Amerisleep Mattress Comparison

Casper launched in 2014. The brand’s flagship bed, the Casper, is made with a triple-layer polyfoam and memory foam comfort system, as well as a high-density polyfoam base layer. The mattress is considered ‘Medium’ in terms of firmness, or a 5.5 on the 1-10 firmness scale.

Amerisleep has been in business since 2007. The AS3 (formerly known as the Liberty) is included in the brand’s current line of memory foam mattresses. This model has a memory foam comfort layer, a dual-layer polyfoam support core, and a cover made of Celliant fabric, polyester, and spandex. The AS3 is considered ‘Medium’ (5.5) in terms of firmness.

Please note: Both Casper and Amerisleep offer other mattresses in addition to the models listed above:

• Casper sells two other beds: the Casper Essential, a memory foam mattress; and the Casper Wave, a memory foam and latex mattress.
• Amerisleep offers four other memory foam mattresses, each with a different firmness: the AS1 (7.5), AS2 (6.5), AS4 (4.5), and AS5 (3.5).

This page will exclusively compare the Casper and AS3 mattresses. For more information about other beds from these brands, please visit our Casper Mattress Reviews and Amerisleep Mattress Reviews pages.

The Casper and AS3 mattresses share the same ‘Medium’ (5.5) firmness, as well as other attributes including close body conforming and above-average motion isolation. However, they also differ in terms of other factors such as price-point and temperature neutrality. This guide will compare the unique pros and cons of each mattress, as well as the individual policies and overall reputations of both companies.

First let’s compare prices of the Casper and AS3. The table below lists current price-points for both mattresses in each available size. Please note that only the AS3 is available in a Split King size.

Now let’s see how the Casper and AS3 are made. The next table lists firmness, thickness, weight, and composition specs for both mattresses.

How is the Casper built?

The Casper has three comfort layers – top and bottom polyfoam layers with a middle memory foam layer – that create a ‘Medium’ feel that provides close body conforming. Its single-layer support core is constructed from high-density polyfoam. This layer reinforces the bed and helps maintain an even sleep surface. The mattress has a 9 1/2″ thickness profile, which is slightly shorter than average.

A Queen-size Casper mattress weighs roughly 71 pounds. This is exceptionally light even by all-foam mattress standards, making the bed relatively easy to lift and rotate as recommended.

How is the Amerisleep AS3 built?

The AS3 is a memory foam mattress with a 3″ comfort layer of 4 PCF foam. This material conforms closely with ‘Medium’ firmness. The bed’s cover is made of polyester blended with Celliant fabric, which helps the mattress absorb less body heat from sleepers and feel relatively cool as a result.

The AS3 has a thick support core consisting of a 2″ transitional polyfoam layer and a 7″ high-density polyfoam base. These layers reinforce the bed very well, helping to maintain a flat, even surface and help the mattress withstand sinkage around the edges better than other all-foam models. A Queen-size AS3 weighs 88 pounds, which is slightly heavier than average, making the bed somewhat difficult to lift and rotate compared to the average all-foam mattress.

Casper Sleeper Ratings

The Casper is considered ‘Medium’ (5.5) in terms of firmness. This feel is optimal for sleepers in the average weight group (130 to 230 pounds), and may also provide adequate conforming for lighter individuals. The mattress also isolates motion transfer very well and produces no noise when bearing weight, making it a good option for couples.

Choosing the right mattress for you can be a difficult decision. Tuck.com strives to help mattress shoppers evaluate different models and decide which product best meets their needs and preferences. To learn more about how we compare products, please visit our Mattress Methodology page.