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.

Product
Firmness
Score
Amerisleep AS3 Mattress
Medium-firm: 6.5/10
4.1/5
Amerisleep AS4 Mattress
Soft: 6/10
4.1/5
Product
Amerisleep AS3 Mattress
Firmness
Medium-firm: 6.5/10
Score
4.1/5
Product
Amerisleep AS4 Mattress
Firmness
Soft: 6/10
Score
4.1/5

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.

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

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

Clarity Score 4.1/5
Read Amerisleep AS3 Mattress Review

Material

Foam

Trial Period

100 nights

Shipping Method

Free shipping minus HI and AK

Firmness

Medium-firm: 6.5/10

Warranty

20-year warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Back Sleeping
Ideal for average weight back sleepers.
Side Sleeping
Ideal for average weight side 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

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

Clarity Score 4.1/5
Read Amerisleep AS3 Mattress Review

Material

Foam

Warranty

20-year warranty

Firmness

Medium-firm: 6.5/10

Shipping Method

Free shipping minus HI and AK

Trial Period

100 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Back Sleeping
Ideal for average weight back sleepers.
Side Sleeping
Ideal for average weight side 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

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

Clarity Score 4.1/5
Read Amerisleep AS3 Mattress Review

Material

Foam

Firmness

Medium-firm: 6.5/10

Trial Period

100 nights

Warranty

20-year warranty

Shipping Method

Free shipping minus HI and AK

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Back Sleeping
Ideal for average weight back sleepers.
Side Sleeping
Ideal for average weight side 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.

YouTube player

 

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

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
Read Amerisleep AS4 Mattress Review

Material

Foam

Trial Period

100 nights

Shipping Method

Free shipping minus HI and AK

Firmness

Soft: 6/10

Warranty

20-year warranty

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Back Sleeping
Ideal for lightweight and average weight back 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

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
Read Amerisleep AS4 Mattress Review

Material

Foam

Warranty

20-year warranty

Firmness

Soft: 6/10

Shipping Method

Free shipping minus HI and AK

Trial Period

100 nights

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Back Sleeping
Ideal for lightweight and average weight back 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

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
Read Amerisleep AS4 Mattress Review

Material

Foam

Firmness

Soft: 6/10

Trial Period

100 nights

Warranty

20-year warranty

Shipping Method

Free shipping minus HI and AK

Price Range

$$$$$

We recommend this mattress for the following sleeper types:

Back Sleeping
Ideal for lightweight and average weight back 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.

YouTube player

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!

Gravatar for Joe Auer

Joe Auer

Joe Auer is the editor of Mattress Clarity. He mainly focuses on mattress reviews and oversees the content across the site.

He likes things simple and take a straightforward, objective approach to his reviews. Joe has personally tested nearly 250 mattresses and always recommends people do their research before buying a new bed. He has been testing mattresses for over 5 years now, so he knows a thing or two when it comes to mattress selection. He has been cited as an authority in the industry by a number of large publications.

Joe has an undergraduate degree from Wake Forest University and an MBA from Columbia University.