Amerisleep AS5 Review

In This Review
Performance Tests | Firmness | Support & Sleeping Positions | Design | Materials | Comparisons | FAQs

At NapLab, we put each mattress to the test.

We test 10 different factors that impact the performance, comfort, and feel of the mattress. We then take the results of that test and compare to every mattress we’ve tested to date.

Check out the full performance table below to see how this mattress ranks:

Factor	Amerisleep AS5	Average
Overall Score	9.10	8.57
Price (Queen)	$1,849	$1,095 (Memory Foam only)
Cooling – Score	9.0	8.7
Sinkage – Depth	2.09″	2.15″
Sinkage – Feel	Moderate	Moderate
Motion Transfer – Score	9.1	8.2
Motion Transfer – Acceleration	7.11 m/s²	8.79 m/s²
Response Time – Score	9.5	8.9
Response Time – Mostly Recovered	0.3 sec.	0.4 sec.
Response Time – Fully Recovered	0.4 sec.	0.9 sec.
Bounce – Height	7.28″	9.52″
Bounce – Feel	Low	Moderate
Edge Support – Score	8.6	8.6
Edge Support – Sitting	4.50″	4.05″
Edge Support – Lying	Excellent	Good
Sex – Score	7.6	8.4
Pressure Relief – Score	10	8.7
Comfort Layer Thickness	7.25″	4.1″
Mattress Thickness	14″	12.0″
Off-Gassing – Score	9.2	8.2
Off-Gassing – Smell	Strong	Strong
Off-Gassing – Days	3 days	6 days
Company – Score	9.0	8.6
Trial	100 nights	178 nights
Warranty	20 years	25% have lifetime warranties, average of other 75% of mattresses is 13 years

How is Amerisleep AS5 Different?

The Amerisleep AS5 has better-than-average performance, but also a price tag that is above average—68% more than the average memory foam mattress ($1,095).

Advantages

Advantages of the AS5 include better cooling, lower levels of motion transfer, and faster material response time. Pressure relief is also fantastic with 7.25″ of material above the support layer (average is 4.1″).

Neutral Factors

This mattress has moderate sinkage and low levels of bounce. Edge support is also a bit of a neutral factor, with sitting edge support slightly deeper than average, but lying edge support slightly more supportive than average.

Disadvantages

Sex performance struggles on the AS5, primarily because of the low bounce. This isn’t really the fault of the AS5, but more so the nature of a soft memory foam mattress. These results aren’t surprising but could be worth considering if sex is critically important to you.

The Amerisleep AS5 has excellent cooling. During our tests, I did not feel any significant level of heat retention around my body.

The mattress has a number of design attributes and materials that improve cooling. First, the cover has a noticeable cool-to-the-touch feel. The cover is infused with specialized cooling fibers.

• Baseline Temperature – the temperature of the mattress before anyone lies on it
• Maximum Temperature (0 minute) – the temperature of the mattress after lying on it for 15 minutes
• Ending Temperature (5 minute) – the temperature of the mattress after being lied upon and having no one on it for 5 minutes

Even after lying in the same position for 15 minutes, the cover remained cooler. Next up, the foams are a proprietary type of memory foam. The foam structure has large open cells throughout.

Essentially, these are small air pockets that allow the foam to breathe substantially better, creating better airflow, which leads to better cooling performance.

In our objective temperature tests, we measured a max surface level temperature of 89.1° F, which is 0.5° cooler than the average of 89.6°, based on all of our tests to date.

Heat Dissipation Over Time

When we consider the objective data, subjective experience, and an analysis of the materials, I’m confident in my view that cooling is excellent.

The Amerisleep AS5 has a moderate level of sinkage. In our tests, we measured a pressure point sinkage depth of 2.09”. This is 0.05” less sinkage than the average of 2.14”, based on all of our tests to date.

The mattress creates a dramatic body-contouring hug. The AS5 uses a 5.0” of memory foam within the comfort layer. Those layers precisely contour to the exact and unique shape of each sleeper’s body.

The level of sinkage is documented in the image below.

In addition, the thin cover on the mattress creates a more significant and direct contact between foams and sleepers, further emphasizing that memory foam feel.

In order to be comfortable on the Amerisleep you’ll really need to enjoy a more significant body contouring hug and the feel of memory foam.

The Amerisleep AS5 has a very low level of motion transfer. During our tests, we measured a total acceleration range of 7.11 m/s². This is 19% less motion transfer than the average of 8.78 m/s².

The mattress has many factors that help to keep motion transfer held to a minimum, including the soft feel, thick memory foam comfort layer, and all foam construction.

The level of motion transfer is also documented in the video below.

In our motion transfer chart, which visualizes our accelerometer data, we can see the highest motion from 0 to 0.22 seconds. Motion drops significantly thereafter and by 0.64 seconds we’ve returned to near-zero levels of energy.

Both the motion duration and motion intensity are kept to very reasonable levels. I don’t expect motion transfer will be an issue for most sleepers.

The Amerisleep AS5 has a very fast responsiveness. In our tests, we measured a mostly recovered time of 0.3 seconds and a fully recovered response time of 0.4 seconds. This is 0.11 and 0.50 seconds faster than the average responsiveness speeds of 0.41 and 0.90 seconds, respectively.

The level of responsiveness is documented in the video below.

At these recovery speeds the AS5 doesn’t quite bounce back to shape instantly, but it’s not far from it.

Amerisleep’s proprietary memory foam has a material responsiveness speed nearly on par with latex and other highly responsive poly foams even though it still creates the feel, contour, hug, and pressure relief of memory foam.

The rapid responsiveness helps prevent sleepers from feeling stuck in the foams or creating difficulty moving around on the mattress. 

The Amerisleep AS5 has a low level of bounce. During our tests, we measured a total bounce height of 7.28”. This is 2.25” less bounce than the average of 9.53”, based on all of our tests to date.

The level of bounce is also documented in the video below.

The combination of being an all-foam mattress, with a softer feel, and thick 5.0” memory foam layer all work together to reduce bounce.

The lower bounce makes it more difficult to move around on the mattress and also negatively impacts sex performance. That said, the low bounce is also the reason for the lower level of motion transfer.

The Amerisleep AS5 has good sitting edge support and excellent lying edge support.

In our sitting edge support tests, we measured a sitting sinkage compression of 4.50”. This is 0.46” more sitting sinkage than the average of 4.04”, based on all of our tests to date.

While the softer feel and thick 5.0” memory foam comfort layer are great for pressure relief and comfort, they are also the reason for the deeper sitting sinkage.

Those materials just don’t have the rigidity and support required to create the best sitting edge support.

The level of edge support while seated is documented in the images below.

While sitting edge support wasn’t exactly incredible, lying edge support was notably better. While lying directly on the edge of the mattress I felt well supported in all sleeping positions.

The AS5 does a much better job at creating support on the edge when weight is more evenly spread out, as it is while lying.

The level of edge support while lying is documented in the images below.

Unfortunately, the AS5 doesn’t use any type of reinforced perimeter edge support foam. This is certainly limiting the sitting edge support performance. Overall, I’m pleased that lying edge support was excellent, but I do wish sitting edge support was more robust.

The Amerisleep AS5 has fair sex performance. On the positive side, noise is minimal, pressure relief is outstanding, and cooling is excellent. Edge support is also good, but far from great.

In our edge support tests, we measured a sitting sinkage compression of 4.5”. This is quite a bit deeper than the average of 4.04”, based on all of our tests to date.

Sex Factor	Factor Weight	Score	Rating
Bounce	65%	7.0	Moderate
Edge Support	20%	8.1	Good
Noise	5%	10	Minimal
Pressure Relief	5%	10	Outstanding
Cooling	5%	9.0	Excellent

That deeper edge sinkage can make certain amorous activities more troublesome. All that said, the most distressing part of dance without pants performance is bounce, which we measured at 7.28”.

This is considerably less bounce than the average of 9.53”, based on all of our tests to date. The lower bounce is the single greatest factor that negatively impacts the sex score.

Unfortunately, lower bounce and weaker edges are a common hallmark of all foam memory foam mattresses, as well as softer mattresses. 

The Amerisleep AS5 has an outstanding level of pressure relief. During our tests, I felt no pressure points anywhere on my body. To the contrary, the mattress is incredibly comfortable.

The AS5 is equipped with a 7.25” comfort layer. This is considerably thicker than the average comfort layer thickness of 4.0”, based on all of our tests to date. All of that extra foam creates the right material conditions to create fantastic pressure relief and comfort.

In addition to quantity, I am impressed with the quality of Amerisleep’s foams. The AS5 uses a proprietary memory foam called Bio-PUR, this foam provides the benefits of memory foam, while minimizing the negatives of traditional memory foam.

The foam looks and feels high quality. When we consider the material specs, my subjective experiences, and an analysis of the design, I’m confident in my view that pressure relief is outstanding.

Pressure Map – Side Sleepers

Pressure Relief (PSI)	Average	Maximum
Side Sleepers	0.21	1.26

Pressure Map – Back Sleepers

Pressure Relief (PSI)	Average	Maximum
Back Sleepers	0.09	0.79

Pressure Map – Stomach Sleepers

Pressure Relief (PSI)	Average	Maximum
Stomach Sleepers	0.12	1.06

Off-gassing on the Amerisleep AS5 is strong right out of the box and the odor lasted for 3 days.

Comparing all mattresses tested to date, the average off-gassing period is 7 days, so the AS5 is 4 days shorter than average.

Amerisleep mattresses come with a 100-night trial period and a 20-year warranty. Shipping is free and so are returns if the mattress ends up not working out.

Company Factor	Factor Weight	Score	Data
Trial Period	15%	8.0	100 nights
Warranty	10%	8.0	20 years
Shipping	5%	10	$0
Returns	20%	10	$0
Trust	50%	9.0	Excellent
Country of Origin	0%		USA

For reference, the average trial period is 178 nights, about 2.5X months longer than the Amerisleep trial. But Amerisleep has a longer warranty.

Considering the 270+ mattresses tested to date, the average warranty is 13 years (excluding 25% of mattresses that offer a lifetime warranty).

The Amerisleep AS5 has a soft feel with a firmness of only 4 out of 10 on the firmness scale.

The most popular firmness is 6 out of 10 (medium-firm) so the AS5 is quite a bit softer. For something firmer, you may want to opt for the AS3 (medium, 5 out of 10) or the AS2 (medium-firm, 6 out of 10).

These alternative options would be better suited for heavier sleepers or those who sleep on their back or stomachs.

The Amerisleep AS5 has excellent support. During our tests, I felt well-supported in all sleeping positions. The mattress uses a 6.75” support foam layer.

This is a good bit thinner than the average support layer thickness of 7.9”, based on all of our tests to date. Even so, when we look at the total 14.0” profile of the mattress and notably thicker than average 7.25” comfort layer, it still has more than enough material to create ample support.

The AS5 has a soft feel, making it ideal for side sleepers, but not particularly great for back or stomach sleepers.

At 14.0” thick the AS5 is 2.0” thicker than the average total mattress height of 12.0”, based on all of our tests to date. Overall, I’m pleased with the support dynamic and expect it to be a non-issue for most sleepers.

Check out the table below to see the sleeper weights and sleeping positions that would be best suited for this mattress.

Sleeper Weight	Stomach Sleepers	Side Sleepers	Back Sleepers
Under 150 lbs.	Yes	Yes	Yes
150-250 lbs.	Maybe	Yes	Maybe
250-300 lbs.	Maybe	Yes	Maybe

Design

The Amerisleep AS5 is a memory foam mattress with an overall thickness of 14″ and a firmness of 4 out of 10.

It is the softest mattress in their lineup and a great option for lightweight sleepers or side sleepers who are looking for deeper contour and hug.

Materials

This mattress is made of all foam and has five distinct layers, including the cover. From top to bottom, the layers of the Amerisleep AS5 include:

• 0.5” Cover (not shown in image below)
• 3.0” Memory foam
• 2.0” Memory foam
• 1.75”  Poly foam
• 6.75”  Support foam

The Cover

The cover of the AS5 foam mattress is their Cooling Refresh Cover. This is the same cover we have seen on other Amerisleep mattresses.

The technology used within the cover is designed to draw heat from your skin and avoid heat retention.  

According to the manufacturer, on average, the sleeping surface will stay 7° cooler over an eight-hour night of rest compared to a traditional 100% polyester cover.

The Refresh Cover is also aimed at improving daily energy and performance as well. This technology uses embedded minerals to help convert body heat to far infrared energy.

The Comfort Layer

The comfort layer on the AS5 includes three separate foam layers. On top, we see a 3.0″ memory foam layer. This is Amerisleep’s Bio-Pur foam. It has an open-cell design, which gives it a more modern memory foam feel, limiting heat retention and preventing any feeling of being “trapped” within the foam.

Below the Bio-Pur layer is a 2.0″ memory foam. This foam is called “Active Flex”. Within the Amerisleep lineup, the AS5 models are the only ones that contain this foam.

According the the manufacturer, Active Flex foam contours like memory foam, but retains a responsive feel (like latex foam). The data from our response tests support Amerisleep’s claim.

The last foam in the comfort layer is a 1.75″ poly foam. This acts more like a transitional foam between the comfort materials and the support layer below.

Note: The AS5 product page says that the third layer should have a Hive-designed convoluted foam. Our model did not appear to have it, or the adhesive was so strong connecting layers that it was not possible to tell.

The Support Layer

The support layer is a 6.75″ Bio-Core support foam. It is high-density and provides consistent support across the entirety of the mattress.

Product Evolution

The Amerisleep AS5 was first released in 2018. Prior to 2018, Amerisleep sold a very similar mattress under the name Amerisleep Colonial. The AS5 is considered the successor of the Colonial.

Amerisleep was founded in 2010 and in 2017 all of their existing mattresses were renamed from words to numbers. Amerisleep Colonial became AS5, Amerisleep Liberty became AS3, etc. In 2017 some materials and covers were also re-designed.

This new naming system allowed for clarity regarding mattress firmness. The higher the number, the softer the mattress. Of the Amerisleep mattresses we’ve tested, the AS2 is the firmest (6 out of 10) and the AS5 is the softest (4 out of 10).

Other Mattresses to Consider

Not sure if the Amerisleep AS5 is the right pick for you? Check out these three other top-rated memory foam mattresses for high-performing alternatives you may want to consider.

Frequently Asked Questions

Still have questions? Check out some of the top FAQs on the Amerisleep AS5 mattress below and get the answers you’re looking for.