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An In-Depth Amerisleep AS4 Mattress Review

The AmeriSleep AS4 is another soft mattress designed by the company. A trendy three layered memory foam mattress for better airflow, comfortable, supportive, and pressure relief rest. It is a technologically advanced, eco-friendly mattress that upholds the brands motto Better Sleep for a Better Tomorrow.
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Amerisleep AS4 Mattress Sleep Score

Amerisleep AS4 Mattress Review

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Highlight Features
Highlight Features

Durable memory foam mattress providing exceptional contouring for pressure relief
Utilizes eco-friendly materials for a healthy sleep

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

  • Designed especially for side sleepers
  • Medium-soft comfort level
  • Proper contouring for pressure relief
  • Eco-friendly materials
  • Comes in different sizes ranging from Twin to Cali King
  • Limited compression
  • Works well with all kinds of frames including slats, spring base and adjustable frames
  • Ventilated construction for a cool, cozy slumber
  • Utilizes advanced technology for enhanced performance
  • Motion isolation
  • Excellent back support
  • Durable structure with resilient base
Amerisleep AS4 Mattress is right for you if:
  • If you are looking for a soft, pain-relieving mattress
  • If you prefer sleeping on your sides
  • If you enjoy the contouring of memory foam
  • If you sleep hot and need a cooling memory foam bed
  • If you seek a value based product offering durable support
Amerisleep AS4 Mattress is not right for you if:
  • If you are looking for mattress with different firmness levels
  • If you are looking for a budget-friendly option
  • If you prefer the bounce of spring mattress


About AmeriSleep

The AmeriSleep AS4 is another soft mattress designed by the company. A trendy three-layered memory foam mattress for better airflow, comfortable, supportive, and pressure relief rest. It is a technologically advanced, eco-friendly mattress that upholds the brands motto Better Sleep for a Better Tomorrow.

Established in 2007, the company set up its headquarters in Arizona with a number of offline stores. With an eye for perfection and focus on detailing, the company has successfully established a range of mattress for different sleeper profiles. All of its products are designed and assembled in the US, ensuring the premium quality of the products.

Their online stores offer added convenience to the consumers as the mattress is transported directly to your doorstep with white glove delivery services. The company also provides 100 nights trial period with hassle-free 100% money back guarantee. You also get 10 years warranty for repair and replacement.

The AmeriSleep AS4 mattress, formerly known as Colonial, along with a variety of other AmeriSleep products is ideal for customers looking for conforming, temperature neutral and elegantly designed memory foam mattresses.

Amerisleep AS4 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.

The medium-soft AmeriSleep AS4 is a memory foam mattress constructed of three different layers, totaling 12 inches in height. The amalgamation of the memory foam, comfort layer and the poly foam provides a right mix of pressure relief and support. Each surface offers a specific feature for body contouring, enhanced comfort, pressure relieving sleep and deep compression support.

The top is covered with a sheet made of polyester, Spandex, and Celliant that comfortably stretches across the mattress. Along with this, the breathable cover and convoluted transition layer combine to provide more airflow through the bed for improved temperature regulation.

This uniquely designed mattress has a ventilated structure allowing smooth airflow for a cool, comfortable sleep. It has a very active response to pressure as the mattress promptly bounces back to its uncompressed form as you turn sides. Surface Modification Technology (SMT) diminishes stifling or being stuck a common problem in conventional memory foams.

The soft contouring yet sturdy back support makes AS4 an ideal choice for side sleepers. Due to its exceptional motion isolation, the bed is best for couples and bed sharing with kids and pets.

Amerisleep AS4 Mattress Technology Details

AmeriSleep AS4 is a medium-soft, 12-inch high three-layered foam mattress designed to offer plush comfort, even weight distribution, and excellent lumbar support.

The top layer is memory foam with 4-inches thickness. It incorporates a unique Bio-Pur ™ technology for improved comfortability. The plush foam offers a slight dip but is still responsive to pressure. For a ventilated, cool sleep, the foam is designed using an Open-cell structure that distributes heat and enhances airflow.

Next is the Affinity layer,b1-inch thick in height. It is a layer of polyfoam surface has a perplexing (eggshell) design. This pattern develops space to allow air to flow through the mattress for enhanced temperature regulation and cooling of the bed.

Lastly is the base layer made of 7 inches thick high-density Bio-Core ™ poly foam. This layer is firm in feel, serving as the foundation of the product. Furthermore, it provides deep compression support to the sleeper. The base also maintains the shape over the years.

The top cover is designed using Celliant with 13 thermoreactive minerals to make the fabric highly breathable. It is blended with polyester and Spandex to improve the stretchability and strength of the material.

Amerisleep AS4 Mattress

Review/Introductory Videos

Introductory Video
AmeriSleep AS4 for Side Sleepers
AmeriSleep Technology Overview
AmeriSleep Motion Transference
AmeriSleep Comparison - AS2 vs AS3 vs AS4

Amerisleep AS4 Mattress Sizing and Pricing

Cali King72" x 84"12"$1900
Full53" x 75"12"$1550
King76" x 80"12"$1900
Queen60" x 80"12"$1700
Split King12"$1700
Twin38" x 75"12"$1400
Twin XL38" x 80"12"$1450

AmeriSleep Mattress Reviews

  • Total Reviews 704
  • Old Reviews 0
  • Unverified 704
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Here is the summary of 704 reviews written on Amerisleep AS4 Mattress

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Amerisleep AS4 Mattress Expert Reviews


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

Mattress Clarity - Joe Auer

March 20, 2018
high quality memory foam mattress, Amerisleep performs exceedingly well. Additionally, the Amerisleep has pretty good edge support for a foam mattress, which makes the mattress actually feel bigger (you can sleep closer to the edge comfortably). 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

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
LATEST PICTURES BY Amerisleep AS4 Mattress


Customers Ultimately Bought

Comfort level

Medium soft 4/10
  • Extra Soft
  • Soft
  • Medium
  • Plush Firm
  • Firm
Height12 "
Weight94 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 AS4 Mattress
  • 4" Memory foam -
  • 1" Egg-crate foam
  • 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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