Amerisleep AS4 mattress

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Amerisleep AS4 Mattress Review

Read our review to see why the AS4 is great for hot sleepers.

Customer Rating: 4.7/5

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The Amerisleep AS4 mattress is one of the softer mattresses from the series of memory foam beds by Amerisleep. It’s built with three layers of memory foam that are softer and more cooling than the AS1, AS2, and AS3 mattresses.

To learn more about this bed, keep reading our in-depth Amerisleep AS4 mattress review.

Amerisleep AS4 Highlights

  • The Amerisleep AS4 offers cooling properties in two of its three layers. The top layer is proprietary plant-based memory foam, which sleeps much cooler than traditional synthetic foam. It undergoes a process called reticulation, where the cell walls of the foam are blown out while the foam shape remains intact, which makes the top layer much more breathable. The middle layer’s surface contains breathable channels that promote higher airflow.
  • In addition, the cover contains Celliant, which is known to reduce pain, regulate body temperature, and promote healthy blood circulation.
  • Amerisleep recommends this mattress most highly for side sleepers and combination sleepers, with a medium-soft supportive feel.

Amerisleep AS4 Mattress Review

Part of Amerisleep’s series of memory foam mattress, the AS4 mattress is one of the softer foam beds in their collection. Its foam layers and Celliant cover are conducive for air flow, pain relief, and healthy blood circulation. You’ll get a healthy night’s sleep on the AS4!

Amerisleep AS4 mattress

The Amerisleep AS4 mattress is a medium-soft mattress offered by Amerisleep. This bed is great for side sleepers and those who tend to sleep hot.

Its built with three layers of memory foam, including Amerisleep’s proprietary, cooling Bio-Pur® and HIVE® comfort layers. These layers are intended to create a soft and responsive feel so you can sink in the mattress enough to be comfortable, but no such much that you can’t move around.

The design of the AS4 also makes it great at relieving pressure, another important factor for side sleepers. Instead of letting you sink in too far and build up pressure in your hips and shoulders, the Amerisleep AS4 evenly distributes your body weight to avoid pain in the pressure points.

Top this all off with the high-performance Celliant® cover made with thermoreactive yarn and you truly have a great bed. This cover design safely turns your body heat into infrared energy to help wick away heat and keep you cool in your sleep.

Stay tuned for the Mattress Advisor score of the AS4 mattress.

Customer Reviews

See what actual customers have to say about the Amerisleep AS4 mattress.

  • “I love the firmness, yet it gives to mold to my body and it is not hot like others have complained about with other memory foam mattresses.” – Katy
  • “Hubby and I have used this mattress for over a year now and still wouldn’t exchange it for another. We have slept better and have less aches and pains since it arrived. It has kept me cooler than our last bed.” – Sleep Addict
  • “I used to wake up every morning with back pain so I was looking for a mattress that would eliminate my pain, but it had to be firm enough for my husband and not too firm for me. This is my first memory foam mattress and it’s perfect! You don’t feel like you’re sinking into the mattress but it also doesn’t feel too hard. I’m also much cooler at night. Great mattress…I’d recommend for anyone!” – Tara

Read more reviews here.

Product Information


94 lbs. for queen




Medium soft: 4/10


Memory foam

American Made

Made in the USA

Compatible Foundations

Amerisleep recommends a flat surface for the AS4. You can use a flat or slatted frame, box spring with plywood, adjustable base or even set it on the floor.

What’s Inside the AS4 Mattress?

The layers inside the Amerisleep AS4 are described as they appear from top to bottom:

  • High-performance Celliant cover: Designed to convert your body heat into infrared.
  • Bio-Pur foam: Breathable cooling layer with open-cell structure
  • Affinity layer: Ergonomic transition foam; provides pressure relief
  • Bio-Core foam support layer: Eco-friendly durability and support
Inside the Amerisleep AS4 mattress

Purchase Information

Purchase Experience

Policy Details
Delivery Compressed and rolled in a box that is 19” x 19” x 42” for a queen
Trial Period 100 days
Warranty 20-year limited warranty
Return Policy Full refund on returns within 100-day trial period
Financing Not available

Sizes and Pricing

Size Dimensions Standard Price*
Twin 38″ x 74″ $1,399
Twin XL 38” x 80” $1,499
Full 54” x 75” $1,549
Queen 60” x 80” $1,699
King 76” x 80” $1,899
Split King 38″ x 80″ (x2) $2,698
Cal King 72” x 84” $1,899

*Prices listed are standard without sales or Mattress Advisor exclusive discounts. Check price using the button below for the best deals on the AS4 mattress.

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Is there anything to watch out for with the AS4?

The Amerisleep mattress will have a slight “new mattress smell” when you first unpackage it. This smell usually dissipates within a few days and is not harmful.

Can I try the AS4 before I buy it?

Amerisleep does have a few select retail stores where you can see the mattress for yourself before making your purchase. (Right now, they’re only in Arizona.) But luckily, you have 100 nights to try the AS4 mattress in your home risk-free with your trial period.

How can I clean the AS4 mattress?

The removable cover on Amerisleep mattresses are easily washable for normal cleaning issues like perspiration and odor removal.

How does the 100-night trial work?

Once you receive your AS4 mattress, you have 100 nights to decide if it’s right for you. If you decide to return it, you can exchange it for another model or return it for a full refund. Remember to try it out for 30 nights before deciding to part ways as it takes some time to fully adjust to a new mattress.

By clicking on the product links in this article, Mattress Advisor may receive a commission fee at no cost to you, the reader. Read full disclosure statement.

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