Amerisleep AS3 vs AS4 Comparison: Which Is Best?

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Amerisleep is a popular company with a line of memory foam mattresses built for different types of sleepers. As the company grows in popularity, people naturally wonder which model in the line would be best for them. The AS3 and AS4 mattresses are two of the most popular offerings from the company that are similar but also slightly different – I’ll try to highlight the main similarities and differences between the two mattresses in this mattress comparison to help people if they are making the decision between the Amerisleep AS3 vs AS4. Note: The AS3 was formerly known as the Liberty and the AS4 was formerly known as the Colonial.

Amerisleep AS3 vs. AS4: Top Similarities

  • The mattresses come from the same company, so things like trial periods, return policies, and customer service quality will all be exactly the same.
  • Both mattresses use bio-based memory foams that are open-celled and more environmentally friendly.
  • Both are catered to side sleepers and combination sleepers who want great comfort and support.
  • Both feature a Refresh Cooling Cover, which is made with technology that is purported to improve circulation.
For more information on all mattresses from Amerisleep, check out the Amerisleep mattress reviews page.
AmerisleepAS3Layers
AS3 layers

Amerisleep AS3 vs. AS4: Key Differences

  • The AS4 is slightly softer, which may make it more appropriate for side sleepers.
  • The comfort layer of the AS4 is one inch thicker, which is ideal for side sleeping.
  • The AS3 costs $300 less than the AS4 because it is thinner overall.
amerisleep as3 vs as4
AS4 layers

Who Should Pick the AS3

  • People who are on a tighter budget (I think given the price range the AS3 is a slightly better value)
  • Those who are heavier and need a more supportive mattress
  • People who don’t exclusively sleep on their side but prefer back sleeping

Amerisleep AS3 Mattress

Amerisleep AS3 Mattress Review

The Amerisleep AS3 is the brand’s most popular model and offers an excellent balance of comfort and support.

Clarity Score 4.1/5
MC Brand Icon MattressMaterial

Material

Foam

MC Brand Icon PropertyTrialPeriod

Trial Period

100 nights

MC Brand Icon PropertyShipping

Shipping Method

Free shipping minus HI and AK

MC Brand Icon PropertyFirmness

Firmness

Medium-firm: 6.5/10

MC Brand Icon MattressWarranty

Warranty

20-year warranty

MC Brand Icon PropertyPrice

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

MC sleeper type back sleepers
Back Sleeping
Ideal for average weight back sleepers.
MC sleeper type side sleepers
Side Sleeping
Ideal for average weight side sleepers.
MC sleeper type stomach sleepers
Stomach Sleeping
Ideal for lightweight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.8/5
Watch Our Video Review

Amerisleep AS3 Mattress

Amerisleep AS3 Mattress Review

The Amerisleep AS3 is the brand’s most popular model and offers an excellent balance of comfort and support.

Clarity Score 4.1/5
MC Brand Icon MattressMaterial

Material

Foam

MC Brand Icon MattressWarranty

Warranty

20-year warranty

MC Brand Icon PropertyFirmness

Firmness

Medium-firm: 6.5/10

MC Brand Icon PropertyShipping

Shipping Method

Free shipping minus HI and AK

MC Brand Icon PropertyTrialPeriod

Trial Period

100 nights

MC Brand Icon PropertyPrice

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

MC sleeper type back sleepers
Back Sleeping
Ideal for average weight back sleepers.
MC sleeper type side sleepers
Side Sleeping
Ideal for average weight side sleepers.
MC sleeper type stomach sleepers
Stomach Sleeping
Ideal for lightweight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.8/5
Watch Our Video Review
Amerisleep AS3 Mattress Review

Amerisleep AS3 Mattress

The Amerisleep AS3 is the brand’s most popular model and offers an excellent balance of comfort and support.

Clarity Score 4.1/5
MC Brand Icon MattressMaterial

Material

Foam

MC Brand Icon PropertyFirmness

Firmness

Medium-firm: 6.5/10

MC Brand Icon PropertyTrialPeriod

Trial Period

100 nights

MC Brand Icon MattressWarranty

Warranty

20-year warranty

MC Brand Icon PropertyShipping

Shipping Method

Free shipping minus HI and AK

MC Brand Icon PropertyPrice

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

MC sleeper type back sleepers
Back Sleeping
Ideal for average weight back sleepers.
MC sleeper type side sleepers
Side Sleeping
Ideal for average weight side sleepers.
MC sleeper type stomach sleepers
Stomach Sleeping
Ideal for lightweight stomach sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.8/5
Watch Our Video Review
See the feel of the AS3 Bed in the video below.
 

Who Should Pick the AS4

  • People who are lighter in weight and don’t need as much support
  • Those who sleep almost exclusively on their side

Amerisleep AS4 Mattress

Amerisleep AS4

The Amerisleep AS4 is one of the brand’s softest models and should be a great fit for side sleepers. 

Clarity Score 4.1/5
MC Brand Icon MattressMaterial

Material

Foam

MC Brand Icon PropertyTrialPeriod

Trial Period

100 nights

MC Brand Icon PropertyShipping

Shipping Method

Free shipping minus HI and AK

MC Brand Icon PropertyFirmness

Firmness

Soft: 6/10

MC Brand Icon MattressWarranty

Warranty

20-year warranty

MC Brand Icon PropertyPrice

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

MC sleeper type back sleepers
Back Sleeping
Ideal for lightweight and average weight back sleepers.
MC sleeper type side sleepers
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review

Amerisleep AS4 Mattress

Amerisleep AS4

The Amerisleep AS4 is one of the brand’s softest models and should be a great fit for side sleepers. 

Clarity Score 4.1/5
MC Brand Icon MattressMaterial

Material

Foam

MC Brand Icon MattressWarranty

Warranty

20-year warranty

MC Brand Icon PropertyFirmness

Firmness

Soft: 6/10

MC Brand Icon PropertyShipping

Shipping Method

Free shipping minus HI and AK

MC Brand Icon PropertyTrialPeriod

Trial Period

100 nights

MC Brand Icon PropertyPrice

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

MC sleeper type back sleepers
Back Sleeping
Ideal for lightweight and average weight back sleepers.
MC sleeper type side sleepers
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review
Amerisleep AS4

Amerisleep AS4 Mattress

The Amerisleep AS4 is one of the brand’s softest models and should be a great fit for side sleepers. 

Clarity Score 4.1/5
MC Brand Icon MattressMaterial

Material

Foam

MC Brand Icon PropertyFirmness

Firmness

Soft: 6/10

MC Brand Icon PropertyTrialPeriod

Trial Period

100 nights

MC Brand Icon MattressWarranty

Warranty

20-year warranty

MC Brand Icon PropertyShipping

Shipping Method

Free shipping minus HI and AK

MC Brand Icon PropertyPrice

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

MC sleeper type back sleepers
Back Sleeping
Ideal for lightweight and average weight back sleepers.
MC sleeper type side sleepers
Side Sleeping
Ideal for lightweight and average weight side sleepers.

Financing Options

Financing options are available for this mattress.

Average Customer Rating
4.7/5
Watch Our Video Review
See the feel of the Amerisleep AS4 with the video below.

Bottom Line

The AS4 is slightly softer, so that is something to note for someone’s decision. I think the AS4 is perhaps the memory foam mattress that sleeps the coolest for me of any that I have slept on, but I think the AS3 Bed is a slightly better value because it costs $300 less than the AS4. Either way, they are both great options and I don’t think people can really go wrong with either one. Save with Amerisleep mattress coupons!

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Joe Auer

Joe Auer

Founder/Managing Editor

About Author

Joe is the founder of Mattress Clarity and has been reviewing mattresses and other sleep products for more than five years. Joe knows a lot about mattresses, having tested more than 100 personally. Through his experience, he has developed a straightforward and practical approach to making mattress recommendations.

Joe does not believe there is one best mattress for everyone and that a more tailored approach is often the most helpful to mattress shoppers. He tries to make clear what types of sleepers a particular mattress would be good for. He also notes what considerations people should make when looking at a particular type of bed.

His extensive knowledge of mattresses, and the mattress industry, has garnered him some media attention. He’s been interviewed and featured in several online publications, including Inc.om, Business Insider, New York Magazine, Huffington Post, and Forbes.

Thanks to his expertise, Joe has tested countless approaches to improving his own sleep quality. He has two top sleep tips that he’s benefitted from personally. He limits his caffeine consumption to 100 mg a day and meditates for 15 minutes daily.

Joe has an undergraduate degree from Wake Forest University and an MBA from Columbia University, where he studied entrepreneurship.

When he isn’t reviewing mattresses, Joe loves to play classical piano, read fiction and non-fiction, and travel.