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An In-Depth Amerisleep AS3 Mattress Review

The Amerisleep AS3 is a best-selling combination foam mattress that blends three layers of foam for a comfortable, conforming, durable and pressure relief rest. The AS3 from the Amerisleep Brand is the companys most versatile mattress.
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Amerisleep AS3 Mattress Sleep Score

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Trial Period
Trial Period

You can try this mattress at home for 100 nights.


This product offers 20 Years warranty.


Free home delivery anywhere in the US.

Overview of Features

  • Adjusts on all bed foundations (slat base, platform base, adjustable bed)
  • Springy top layer for resilience
  • Memory Foam without feeling stuck
  • Body Contouring
  • Memory foam layer for enhanced comfort
  • Cool and breathable feel
  • Edge Support
  • Available in various sizes from Twin to Split King
  • Pressure relief and ease of pain
  • Bio-Pur and Affinity with SMT comfort layers
  • High-performance Celliant cover
  • Motion isolation
  • Offgassing
  • Comfortable regardless of position
  • Supports all types of body structures (regular, lightweight, heavyweight)
  • Easy to maintain and lift
Amerisleep AS3 Mattress is right for you if:
  • If you are a combination sleeper
  • If you are looking for a quality mattress at an affordable price
  • If you prefer a mattress with a balanced feel of springs and foam
  • If you are looking for a pressure relieving bed
Amerisleep AS3 Mattress is not right for you if:
  • If you are looking for mattress with different firmness levels
  • If you are a sleeper who remains in one position throughout the night


About AmeriSleep

The Amerisleep AS3 is a trendy combination foam mattress that blends three layers of foam for a comfortable, supportive, enduring and pressure relief rest. The AS3 from the Amerisleep Brand is the companys most versatile mattress. The revitalizing rest with technologically advanced, American-made, eco-friendly mattresses is what makes this brand one of its kind. The Amerisleep motto is Better Sleep for a Better Tomorrow.

Amerisleep AS3 is a US-based company, having four brick and mortar showrooms in Arizona. All mattresses are designed and assembled in the US. Established in 2007, their intention to perfection and their focus on creating different mattress variants for different sleeping styles has attracted lots of customers. Amerisleep offers standard free curbside shipping to anywhere in the contiguous USA, a 20-year warranty, a 100 night trial period and 100% full refund on their products. If your Amerisleep mattress is not what you were looking for, the company offers a hassle-free return process. Moreover, Amerisleep does their best to donate any returned mattresses to local charities.

The Amerisleep AS3 mattress formerly known as Liberty along with a variety of other Amerisleep products is ideal for customers looking for conforming, temperature neutral and elegantly designed combination foam mattresses.

Amerisleep AS3 Mattress Benefits Overview

The Amerisleep brand of designers and engineers carefully source and select materials for unique performance characteristics. The brand is continually improving the quality of its mattresses based on the latest technology and customer feedback. Customer satisfaction is a key to their success, an important factor in considering your mattress buying options. The top-selling Amerisleep AS3 is an all foam mattress constructed of 3 different layers, totaling 12 inches in height.

The AS3 is formulated to have a medium firmness and lies in the mid of the Amerisleep line. The amalgamation of the memory foam comfort layer and the poly foam below should provide a right mix of pressure relief and support. The sheets are a combination of Memory Foam, Poly Foam, and High-Density Poly Foam Base. Each layer offers a specific feature for body contouring, enhanced comfort, pressure relief sleep and deep compression support.

For example, below the comfort layer is a 2-inch layer of poly foam with a 1.65 lb density. This foam is a bit solid, it not only acts as a transition layer between the soft memory foam above and the firm base below but to provide some bounce to the mattress so the sleeper won’t feel stuck when trying to adjust their position. Amerisleep AS3 mattress is preferred by sleepers who love a pressure relieving foam feel and change positions while sleeping. The different layers offer cool comfort and supportive rest. Do you sleep on your side, front or back?

The Amerisleep AS3 has a medium-firmness level. The high-density poly foam, this layer is firm to support the comfort, and transition layers above as well as provide in-depth compression support to the sleeper on top of the mattress. The base not only gives the AS3 its shape but also provides the mattress with some durability. Along with this, the breathable cover and convoluted transition layer combine to provide more airflow through the bed for improved temperature regulation.

Amerisleep AS3 Mattress Technology Details

The Amerisleep AS3 is a memory foam mattress comprising 4 lb. plant-based memory foam with a transitional Affinity layer for a plusher support level.

The top comfort foam layer is a 3-inch layer of open-cell Bio-Pur foam that is designed to be breathable and has the cooling technology to wick away heat and moisture. It is intended to be responsive to each sleeper and relieve pressure points while conforming to the curves of the body. It also offers some support when paired with the other layers to allow more massive body parts to be held up to promote natural spinal alignment.

The support core comprises a 2-inch foam layer and a 7-inch foundation support layer. However, the 2-inch layer is a transition layer that reasonably supports weight across the mattress and relieves pressure. The 7-inch Bio-Core layer is a dense support foam layer that offers a firm foundation for the mattress.

The top layer cover of the Amerisleep AS3 mattress is constructed of various materials including Celliant, a plant-blend material applied to make the fabric cover more breathable. The benefit of Celliant is unique to mattress covers and is blended with polyester and spandex. The AS3 model’s mattress cover can also be unzipped for easy spot cleaning.

Amerisleep AS3 Mattress

Review/Introductory Videos

Review/Introductory Video
Set up/foundations

Amerisleep AS3 Mattress Sizing and Pricing

Cali King72" x 84"12"$1700
Full53" x 75"12"$1250
King76" x 80"12"$1700
Queen60" x 80"12"$1400
Split King12"$1400
Twin38" x 75"12"$1100
Twin XL38" x 80"12"$1150

AmeriSleep Mattress Reviews

  • Total Reviews 4117
  • Old Reviews 0
  • Unverified 4117
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Here is the summary of 4117 reviews written on Amerisleep AS3 Mattress

  • Happy

  • Disappointed

Back pain relief21

Amerisleep AS3 Mattress Expert Reviews


The Best Mattress

February 22, 2018
The eco-friendly alternative to mainstream memory foam, the Liberty bed by Amerisleep scores well in customer satisfaction for comfort, affordability, safety, and health. Leave sleepare and read full review

Mattress Guides - Ted Wilson

March 20, 2018
This affordable, highly-rated mattress introduces a few high-quality features usually only seen in very expensive premium competitors, and has unique green benefits. Leave sleepare and read full review

Mattress Clarity - Joe Auer

March 20, 2018
great option for side/combo sleepers who want a memory foam feel without the main drawbacks memory foam is known for. I think the mattress is a great value and is definitely worth taking a hard look at. Leave sleepare and read full review

Get Best Mattress - Chris Young

March 19, 2018
Amerisleep has dedicated technology to creating high quality mattresses with key differences with the aim of satisfying different consumer needs and preferences. This brand has built a positive name in the market and for good reason too. Leave sleepare and read full review

Sleep Advisor - Mark Reddick

March 20, 2018
Amerisleep line is not the cheapest on the market, but its still one of the best value products you can find. They have the most options and firmness levels, so its just a matter of finding the right one that fits your preference. Leave sleepare and read full review

Mattress Matchers - Kamil Spark

May 3, 2018
AS3 is among the mattress models manufactured by Amerisleep with high-quality materials. Being a medium firm product, it offers a good amount of support and comfort to suit a wide range of sleeping requirements. Leave sleepare and read full review

Sleep Delivered - Trish

February 17, 2018
Great Choice for: the eco-minded buyer who needs a firmer or softer mattress than most. Leave sleepare and read full review

The Sleep Judge - Frank Apodaca

March 19, 2018
someone who is looking for a very eco-friendly alternative to regular memory foam mattresses. Leave sleepare and read full review

Slumber Search - Chris Moberg

April 20, 2018
Amerisleep offers a line of high-end memory foam mattresses for an environmentally conscious consumer. Each mattress is made with a blent of bio-foams that are more eco-friendly than the traditional synthetic-based memory foam material. Leave sleepare and read full review

Good Bed - Michael Magnuson

February 20, 2018
The Liberty is an unquilted foam core soft mattress model that is manufactured by AmeriSleep. Leave sleepare and read full review
LATEST PICTURES BY Amerisleep AS3 Mattress


Customers Ultimately Bought

Comfort level

Medium 5/10
  • Extra Soft
  • Soft
  • Medium
  • Plush Firm
  • Firm
Height12 "
Weight96 pounds
Warranty20 years
Trial period100 days
Country of originUSA
Free deliveryYes
Mattress build3 layers foam
Fits adjustable bedYes
Quilted foamNo


Cali King72" x 84"
Full53" x 75"
King76" x 80"
Queen60" x 80"
Split King
Twin38" x 75"
Twin XL38" x 80"

Other Specification


Amerisleep AS3 Mattress
  • 3" Memory foam -
  • 2" Polyfoam/polyurethane foam - pale yellow
  • 7" High density polyfoam - dark green


Similar Mattress Options
Helix Midnight LuxeSaatvaWinkbeds


Helix Midnight Luxe MattressSaatva MattressWinkbeds Mattress




1" Memory foam -
2" Support layer
1" Polyfoam/polyurethane foam - pale yellow
8" Pocket coils
1" High density polyfoam - dark green
1.25" TitanFlex foam
0.375" Memory foam -
4" Individually pocketed coils
7" Continuous coils
2" Polyfoam/polyurethane foam - pale yellow
2.5" Microcoils
7.5" Pocket coils


MediumFirmCushion Firm


100 Days120 Days120 Days


15 years15 years10 years


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