AS4

Formerly known as Colonial

The AS4 is our medium-soft mattress. It’s great for side sleepers, and anyone who likes more cushioning while they’re in bed. We combine our proprietary, cooling Bio-Pur™ foam and Affinity with SMT comfort foam layers to create a soft but responsive feel that relieves pressure points and makes you feel like you’re floating. Plus the high-performance Celliant® cover is made with thermoreactive yarn to safely turn body heat into infrared. Your comfort is guaranteed.

Profile height: 12-inch Feel: Medium Soft
Size
Price
$1599 $1499 with promo
Save $100.00
 

Wonderful bed!!

My husband and I have both noticed a reduction in back pain and better overall sleep.

By 

from Phoenix AZ

About Me Midrange Shopper

 

LOVE THIS MATTRESS

Fast Shipping Customer Service was great! Loving this new bed!! I purchased the whole set up mattress frame pillows and mattress topper....Worth the money!!

By 

from Greensboro NC

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

No mattress is more carefully engineered.
  • For Back & Stomach Sleepers

  • For Side & Combo Sleepers

  • AS1

    Formerly Americana

    Firm

  • AS2

    Formerly Revere

    Medium Firm

  • AS3

    Formerly Liberty

    Medium

  • AS4

    Formerly Colonial

    Medium Soft

  • AS5

    Formerly Independence

    Soft

Too firm:
Pressure Points

(Futon mattress)

Too soft:
No support

(Pillow top mattress)

High-Performance Celliant® Cover

Celliant® is an advanced fabric made with 13 thermoreactive minerals that helps improve the performance of the mattress.

Extra-Breathable cooling layer

Our Bio-Pur™ foam is five times more breathable than traditional memory foam, because of it’s advanced open-cell structure. It wicks away heat while you sleep and can help keep you cool and comfortable.

Enhanced "Feels-like-you're-floating" layer

The Affinity layer with Surface Modification Technology (SMT) is our ergonomic transition foam. It has “zones” that provide extra pressure relief in key areas like the shoulders and lower back, along with precision-cut channels that carry away even more heat and moisture. It’s enough to make you feel like you're weightlessly resting on a cloud.

Sag-free & Eco-friendly Support

Our Bio-Core™ foam support layer won't sag even after decades of use. And, like our Bio-Pur™ foam, it’s partially made from plants instead of petroleum so it’s eco-friendly.

Tested to get you more sleep.

Amerisleep mattresses are expertly designed to help you get more sleep — guaranteed. Our mattresses are built with performance in mind down to the last detail. That even includes the cover, which is a critical part of a mattress because it's the layer closest to your body when you sleep.

Amerisleep is officially licensed to use Celliant® in our covers. This advanced fabric combines 13 minerals into thermoreactive yarn that converts body heat into infrared.

We created a superior memory foam that helps keep you cool.

Traditional memory foam is made from dense material, so it traps your body heat and can make you sweaty and uncomfortable while you’re in bed — and who can sleep like that?

We developed our foam with an enhanced "open cell structure," which means there is more air space between the foam particles. That space wicks away heat while you sleep, and can keep you cooler and more comfortable. Remember, you have 100 nights to try it for yourself - if you don't love it, give us a call and we'll pick up the mattress and refund you completely!

On top of that, our foam is also the most environmentally friendly. Our patented foam-making process uses plants to replace some petroleum, and is the only manufacturing method that exceeds the standards of the Clean Air Act.

More comfort. Less “stuck”.

Our foam is also better than traditional memory foam because it recovers its shape faster. With a typical foam mattress, you often wind up “stuck” when you change positions but the mattress is still holding your previous shape. That’s because it takes around 60 seconds for the foam to bounce back.

Ours bounces back in just four seconds, so as you move at night your mattress keeps up with you, providing superior comfort.

 

Super Comfy!

I'm getting the best sleep ever! My Fitbit tracker shows my awake and restless times were cut in half.

By 

from Chandler AZ

About Me Midrange Shopper

 

Most Comfortable Bed Ever

I sleep on this bed every night and it is very comfortable. plus..it is made in America! Would order more products from Amerisleep and highly recommend to others.

By 

from Albany New Yor

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

Use it on any frame you want (even none!)
Directly on the floor

No furniture, no problem. You can put your Amerisleep mattress directly on the floor.

Box Spring

If you want to use your existing box spring, place a piece of 3/4” moisture resistant plywood directly on top.

Flat or slatted frame

A flat platform will work perfectly, so long as the gaps between the slats are no more than three inches apart.

Adjustable Base

Adding an adjustable base can elevate your comfort, allowing you to read or watch tv in bed.

What would you do with more energy
and less pain?

Imagine waking up each morning with no pain and increased energy. How would that change the way you approach your day? Would you finally be able exercise regularly? Would you be able to perform better at work instead of constantly feeling groggy and needing another cup of coffee?

Sleep quality is so important because we spend about a third of our lives in bed!

That means, besides our jobs and our families, our sleep probably has the biggest impact in our quality of life. The number of daily problems that go away with a good night’s sleep is astounding — but that only happens if you actually do something to improve your sleep.

If you just keep things the same, you’ll keep getting the same disappointing results. And don’t you deseve better?

 

Awesome

By 

from Reno NV

About Me Midrange Shopper

 

Extremely comfortable

By 

from CA

About Me Midrange Shopper

 

Wish we had this bed 10 years ago!

By 

from VT

About Me Midrange Shopper

 

Geat quality

By 

from Campbellsville

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

100 Night Trial, Free Returns
Learn more about our 100 Night Sleep Trial
Sleep Trial & Warranty Information
Back to Front
 

very comfortable

This mattress is used on our spilt-king adjustable frame and it feels very good.Most of the time when I go to bed at night I watch TV for an hour but I fall asleep with in ten minutes. The mattress is not too firm but just right and I get a good night sleep. I looked at many mattress and and I glad I choose the colonial mattress from amerisleep.

By 

from St.Augustine Fl

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

We use more eco-friendly memory foams.
Yet another way we’re better.

Amerisleep is one of the most eco-friendly mattress companies. From the way we make our foam all the way through how it arrives at your door, we work hard to use processes that are sustainable — literally from start to finish.

First, our patented Variable Pressure Foaming (VPF) process allows us to use plant-based materials to replace some petroleum, so it's better for the environment. It also reclaims and recycles any waste, so there is no air pollution. It's the only process for making foam that meets the Clean Air Act's standards.

Once we've made your mattress, we pack it up in a box made from post-consumer materials before shipping it to your door. Being more eco-friendly is just one more thing that makes our mattresses different than our competitors.

Plant-based
Formula

Zero emissions
manufacturing

eco-box
delivery

Fast, Easy & Free Shipping

Your mattress ships to you compressed in an eco-friendly box small enough that we can use FedEx. That means it gets to you quickly, usually within a week of your purchase!

 

This is an incredibly comfortable mattress. Worth every dime

Except for my occasional bouts of insomnia I'm enjoying the best sleep of my life due vastly to this mattress

By 

from Medford OR

About Me Midrange Shopper

 

This is our 4th Mattress!

Amazing product and very happy with the quality of the Colonial bed. Recommend it!

By 

from Gilbert Az

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

See what our customers have to say -
don't you wish you slept this good?

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

REVIEW SNAPSHOT®

by PowerReviews
AmerisleepAS4
 
4.7

(based on 388 reviews)

Ratings Distribution

  • 5 Stars

     

    (287)

  • 4 Stars

     

    (83)

  • 3 Stars

     

    (13)

  • 2 Stars

     

    (3)

  • 1 Stars

     

    (2)

98%

of respondents would recommend this to a friend.

Pros

  • Comfortable (347)
  • Good support (337)
  • Holds shape (290)
  • Soft feel (267)
  • Durable (220)

Cons

  • Too hard (43)
  • Develops cavity (8)
  • Too soft (8)

Best Uses

  • Primary bed (372)
  • Guest bed (25)
    • Reviewer Profile:
    • Midrange shopper (270), High-end shopper (78), Budget shopper (30)

Reviewed by 388 customers

Displaying reviews 1-10

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(2 of 2 customers found this review helpful)

 
5.0

Pillow Top Feel

By 

from Lancaster PA

About Me Midrange Shopper

Verified Reviewer

Pros

  • Good Support
  • Soft Feel

Cons

    Best Uses

    • Primary Bed

    Comments about Amerisleep AS4:

    Orginally ordered the Liberty in May. It was slightly firmer than I expected. I gave it a whirl until the end of June. Decided I needed something softer. I choose the next mattress down - Colonial. It was perfect. Firm like the Liberty but with a pillow top feel. LOVE IT!

    (1 of 1 customers found this review helpful)

     
    5.0

    It's a wonderful mattress.

    By 

    from Bellevue, WA

    About Me Midrange Shopper

    Verified Buyer

    Pros

    • Comfortable
    • Holds Shape
    • Sturdy

    Cons

      Best Uses

      • Primary Bed

      Comments about Amerisleep AS4:

      Really awesome mattress. I highly recommend it

      Service and delivery comments:

      We had ordered the softer mattress, but it ended up too soft for us side sleepers. They took care of us and shipped a former mattress to us.

       
      5.0

      Superior product and customer service

      By 

      from Pasadena, CA

      About Me Midrange Shopper

      Verified Buyer

      Pros

      • Comfortable
      • Good Support
      • Holds Shape
      • Soft Feel

      Cons

        Best Uses

        • Primary Bed

        Comments about Amerisleep AS4:

        The mattress has been wonderful -- it has the right amount of firmness, but is also comfortable to sleep on. We have been very happy with it.

        (1 of 1 customers found this review helpful)

         
        3.0

        Great mattress, just not for us

        By 

        from Portland, Or

        About Me Midrange Shopper

        Verified Buyer

        Pros

          Cons

          • Too Hard

          Best Uses

          • Primary Bed

          Comments about Amerisleep AS4:

          This was a high quality bed, but it did not work for us. It was too firm and the edges hard little to no support. That was important for us. Other wise, I was impressed with the customer service and communication during the return process.

           
          5.0

          So happy!

          By 

          from College Station, TX

          About Me Midrange Shopper

          Verified Buyer

          Pros

          • Comfortable
          • Good Support
          • Holds Shape
          • Soft Feel
          • Sturdy

          Cons

            Best Uses

            • Primary Bed

            Comments about Amerisleep AS4:

            I was very worried about buying a mattress online but Amerisleep's risk free return policy put me at ease! We ordered the queen sized Colonial bed and couldn't be happier. I would definitely recommend Amerisleep!

            Service and delivery comments:

            Delivery was on time and the mattress was pretty compact. Once we opened the bag, the mattress regained its shape pretty quickly.

             
            5.0

            My wife loved it.

            By 

            from El Paso, TX

            About Me Midrange Shopper

            Verified Buyer

            Pros

            • Comfortable
            • Good Support

            Cons

            • Too Hard

            Best Uses

              Comments about Amerisleep AS4:

              So my wife loved it. I had a little hard of a time sleeping on my side. It put a little too much pressure on my side. But when I laid down on my back it was super comfortable. The company was beyond excellent with the return. I hate that it didn't work out for me!

               
              4.0

              Excellent customer service and worth trying out.

              By 

              from Las Vegas, NV

              About Me Midrange Shopper

              Verified Buyer

              Pros

              • Good Support

              Cons

              • Too Hard

              Best Uses

              • Primary Bed

              Comments about Amerisleep AS4:

              We tried this mattress out and overall was impressed with the quality however it just didn't help us sleep any better than the mattress we were currently using.

              Service and delivery comments:

              Excellent service. Once we determined we wanted to return the mattress the customer service team was extremely empathetic and did not try to use any guilt sales tactics to deter us from returning. This mattress is definitely worth trying out as one could certainly fall in love with it. Unfortunately it just wasn't the one for us.

               
              5.0

              I like this bed

              By 

              from Kansas

              About Me High-end Shopper

              Verified Buyer

              Pros

              • Good Support

              Cons

              • Too Hard

              Best Uses

              • Primary Bed

              Comments about Amerisleep AS4:

              I like this bed quite a bit.

              Service and delivery comments:

              Quick delivery

               
              3.0

              Traded this in for a firmer Amerisleep mattress.

              By 

              from Boynton Beach, Fl

              About Me High-end Shopper

              Verified Buyer

              Pros

              • Holds Shape
              • Sturdy

              Cons

              • Too Soft

              Best Uses

              • Primary Bed

              Comments about Amerisleep AS4:

              Colonial was not firm enough, so we traded it for the Liberty. Happy sleepers now.

              Service and delivery comments:

              Service was great. Although first mattress didn't work, trade in was easy.

               
              4.0

              Firmer than expected

              By 

              from Orlando, FL

              About Me High-end Shopper

              Verified Buyer

              Pros

              • Good Support
              • Holds Shape
              • Sturdy

              Cons

              • Too Hard

              Best Uses

              • Primary Bed

              Comments about Amerisleep AS4:

              My wife and I purchased the bed as a replacement to our Tempurpedic that was too hard. We purchased the second to the softest thinking it would be a nice blend between medium and soft. We slept on it three nights before having to add a memory foam topper to it. While it was too hard for us, it was better than the "brick" of a Tempurpedic we were sleeping on. We gave the bed two months worth to see how we would like it but it was just to hard. It was also bouncier than a Tempurpedic as well with a more resilient foam that retained its shape faster than Tempurpedic. This we liked about it more than them.

              Service and delivery comments:

              Delivery was prompt, professional, clean, and quick.

              Displaying reviews 1-10

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              *Reviews

              All featured customer reviews are unaltered and verified by PowerReviews. The comments made by customers are not intended as advertisements, and should be understood as the perspective of each individual based on their experience. These reviews should not be construed to mean that these experiences are universal or that results will always be the same.