Amerisleep AS4 (Formerly Amerisleep Colonial) Mattress Review

Scott White
Chief Sleep Researcher
Updated 3 Days Ago

The firm Amerisleep Colonial mattress pairs responsive Bio-Pur foam with high-density support foams for proper spinal alignment and alleviated pressure points. A robust coil-on-coil innerspring design provides edge support and cooling airflow while high-density foams minimize motion transfer between couples. With luxurious craftsmanship and advanced comfort technologies, the Colonial is built to provide exceptional support and cooling.


This model offers more pressure relief compared to its predecessor. It's an excellent choice for those suffering from chronic pain, providing restful, restorative sleep.

Ensures top-notch edge support in their mattresses. Their robust design can endure long hours of pressure, making it a brilliant choice for those who spend considerable time sitting on the bed's edge.

Cooling Gel Foam: The mattress includes a cooling gel memory foam layer that efficiently regulates temperature to keep hot sleepers comfortable all night long. The cooling gel foam also contours to the body, providing personalized comfort.

Our Recommendation

While this is a impressive option, one name stands out as our number one pick: the Saatva mattress. We rigorously research and review mattresses to help you find the perfect night's rest. Our top pick, the Saatva mattress, stands out for its unparalleled comfort, superior support, and durability. Crafted with eco-friendly materials and multiple firmness options, it's the cost-effective choice for your best sleep yet. Discover the magic of Saatva and elevate your sleep experience.



Looking for budget mattress under $1000    

Wanting a super firm feel    

Needing strong bounce or motion isolation


Wanting Amerisleep's advanced memory foam    

Looking for lots of contouring and pressure relief    

Needing excellent motion isolation    

Wanting eco-friendly, quality materials    

Looking for a medium-firm feel    

Needing cooling and comfort technologies

The Amerisleep AS4 (formerly called the Amerisleep Colonial) blends the softness you want with the support you need. It's designed specifically for side sleepers. The AS4 provides plush comfort that cradles your shoulders and hips. It uses eco-friendly, heat-wicking materials to keep you sleeping cool and comfy. Try the AS4 for 100-nights risk-free, today!

Get Amerisleep AS4 (Colonial) if...

  • You're a side sleeper. The Amerisleep AS4 is made with side sleepers in mind. The top foam layer is very soft and cradles your hips and shoulders very comfortably.
  • You tend to sleep hot. Amerisleep's Bio-Pur® material layer features an open-cell design that allows more air to circulate than traditional foam beds.
  • You want a mattress with support. Amerisleep's construction provides targeted pressure relief to your back, hips, and shoulders, simultaneously resisting sagging.

Skip Amerisleep AS4 (Colonial) if...

  • You dislike memory foam. The AS4 is built with several layers of foam and gives that sinking feeling of classic memory foam.
  • You sleep predominately on your back or stomach. The AS4 has a medium-soft feel that back and stomach sleepers might find unsupportive. Instead, you should consider one of Amerisleep's firmers models.


  • Eco-friendly. They use plant-based and eco-friendly materials certified by CertiPUR-US®.
  • Backed by a 20-year warranty.
  • Amerisleep mattresses are proudly made in America.


  • A bit pricey, definitely an investment


Amerisleep AS4 has a medium-soft feel, ranking 5/10 on the firmness scale. This mattress works best for side sleepers who want plush comfort with targeted support for hips and shoulders.  

Construction Key Points

  • The AS4 has a height of 12".
  • Cover: Features a zip-off cover that's washable, keeping your bed fresher for longer.
  • First Layer: The top layer is made with Bio-Pur®. This plant-based material has an open-cell design that keeps you cool throughout the night.
  • Second Layer: The Hive® transition layer features hundreds of foam hexagons grouped into 5 comfort zones. These expertly cushion and support your head, shoulders, back, hips, and feet to keep you properly aligned.
  • Base Layer: The Bio-Core® base layer provides strong support that doesn't sag or leave indentations.

Support & Motion Isolation

Because of the all-foam design, the AS4 does an excellent job at eliminating motion transfer. The thick layers absorb motion incredibly well; especially important if you sleep with a very active sleep partner.

As for edge support, it's decent but not great. Foam mattresses aren't known for having the best edge support, so it was to be expected. While it does compress if you sit or lie near the edge of the bed, you won't feel as if you're going to fall off.

Reasons to Buy Amerisleep AS4 (Colonial)

  1. This is an excellent choice if you want to sleep cool. The plant-based Bio-Pur® material's open design creates multiple air channels that continually allow air to flow in, and heat to flow out, so you don't sleep hot.
  2. You get that plush memory foam feel without getting stuck. The 4" of soft foam responds very quickly, making it easy to move around on the mattress.
  3. This mattress does a great job at isolating motion. If you sleep with a partner, you won't disturb their sleep with your movements and vice versa.

Reasons to Avoid Amerisleep AS4 (Colonial)

  1. If you're a back or stomach sleeper, you're going to find this mattress too soft for your needs. Opt for one of Amerisleep's firmer models.
  2. If you're on a budget, looking to spend $500 or less, the Amerisleep AS4 is outside of this price range.

Amerisleep AS4 is an ideal choice if you want a soft yet supportive mattress designed specifically for side sleepers. You can get 30% off Amerisleep AS4, today!

Where can I find a great, affordable mattress (in 2024)?

If you're searching for an affordable mattress that offers a wide range of comfort and pressure relief, we've compiled a list of mattresses for you to consider:

  1. Saatva Mattress - fantastic for all sleep positions, and is rated our Best Mattress of 2024.
  2. Puffy - feels like you're sleeping on a cool cloud (at a good price).
  3. Ghostbed - beautiful, plush cover w/ aerated latex and healthy spinal alignment.
  4. Winkbeds - 3-stage back relief with free shipping and returns.

Read our short, well-researched 10 Best Mattresses of 2024, here. Our ultimate goal is to help you pick your perfect mattress online, today!




What makes American Mattress unique?

As a local and family-owned mattress retailer, American Mattress provides a wide selection of major brands with convenient in-store shopping across their Midwest showrooms.

How do American Mattress mattresses regulate sleep temperature?

Temperature regulation depends on the specific mattress model and materials. Basic innerspring and foam options likely lack advanced cooling technologies.

Can American Mattress mattresses help with back pain?

With a broad range of mattresses sold, pressure relief suitability varies by model. In-store testing helps determine optimal back support and pain relief.

What are the trial periods and warranties at American Mattress?

Trial periods and warranties vary greatly depending on the brand and mattress model sold. Their staff can advise on specific policies.

Does American Mattress offer free mattress delivery?

American Mattress provides free local delivery on most mattress sets within certain mile limits. Additional charges may apply for longer deliveries.

Are American Mattress mattresses environmentally friendly?

Eco-friendliness depends on the specific mattress. This is not a uniform feature across their wide selection.

How is American Mattress’ pricing compared to other retailers?

As a local store, American Mattress offers competitive pricing combined with bundled discounts when purchasing mattress sets with other furniture.

Can American Mattress mattresses be used with adjustable bases?

Adjustable base compatibility depends entirely on the mattress model, not the retailer. This should be verified before purchasing.

Is American Mattress’ customer service reliable?

Reviews indicate knowledgeable sales associates and responsive customer service when arranging deliveries, addressing issues, or general questions.

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