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 7% ($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 364 reviews)

Ratings Distribution

  • 5 Stars

     

    (268)

  • 4 Stars

     

    (80)

  • 3 Stars

     

    (11)

  • 2 Stars

     

    (3)

  • 1 Stars

     

    (2)

98%

of respondents would recommend this to a friend.

Pros

  • Comfortable (329)
  • Good support (319)
  • Holds shape (275)
  • Soft feel (254)
  • Durable (208)

Cons

  • Too hard (38)
  • Develops cavity (8)
  • Too soft (7)

Best Uses

  • Primary bed (350)
  • Guest bed (25)
    • Reviewer Profile:
    • Midrange shopper (257), High-end shopper (71), Budget shopper (27)

Reviewed by 364 customers

Displaying reviews 1-10

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5.0

I would recommend this bed to anyone!

By 

from Athens, GA.

About Me Midrange Shopper

Verified Buyer

Pros

  • Best bed I have ever had!!
  • Comfortable
  • Good Support
  • Holds Shape
  • Soft Feel
  • Sturdy

Cons

    Best Uses

    • Primary Bed

    Comments about Amerisleep AS4:

    My husband and Isleep through the night on this bed. I don't wake up anymore in the middle of the night with hip pain. Without a doubt, the best bed we have ever had!!

    Service and delivery comments:

    Bed was delivered to our new address as scheduled. We had no problems setting it up.

     
    5.0

    Great mattress if you are replacing a pillow top mattress

    By 

    from Walled Lake MI

    About Me Midrange Shopper

    Pros

    • Comfortable
    • Good Support
    • Holds Shape
    • Soft Feel

    Cons

      Best Uses

      • Primary Bed

      Comments about Amerisleep AS4:

      Replaced a Liberty that was just too firm. We've not had the mattress about a week and what a good decision, returning the Liberty and replacing with the Colonial. It has the plushness we liked in the pillow top but still isn't so plush that you cant get out of the bed.

      Service and delivery comments:

      Delivery was in 5 days from order so as with the Liberty, prompt delivery. Working with us on replacing the Liberty was fantastic!!!

       
      5.0

      Very happy that I found this Company!

      By 

      from Stockton, CA

      About Me Midrange Shopper

      Verified Buyer

      Pros

      • Comfortable
      • Good Support
      • Holds Shape
      • Soft Feel

      Cons

        Best Uses

        • Primary Bed

        Comments about Amerisleep AS4:

        Been three full months and the mattress is wonderful!

         
        5.0

        Love this new Mattress

        By 

        from Fullerton, CA

        About Me Midrange Shopper

        Verified Buyer

        Pros

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

        Cons

          Best Uses

          • Primary Bed

          Comments about Amerisleep AS4:

          Suffered with a Sleep Number bed for 5 years, $8,500 down the drain. if you purchase an Amerisleep mattress, be assured it DOES work with the Sleep Number Adjustable base. If you want a great nights sleep, you can't go wrong with the Colonial Bed Mattress... not too soft, not to firm, JUST RIGHT!

          Service and delivery comments:

          Very Prompt. Comes rolled up tight in brown boxes.. kinda weird, but works!

           
          5.0

          So glad I got it!

          By 

          from Corona CA

          About Me Budget Shopper

          Verified Buyer

          Pros

          • Comfortable
          • Holds Shape
          • No smell at all
          • Soft Feel

          Cons

            Best Uses

            • Guest Bed
            • Primary Bed

            Comments about Amerisleep AS4:

            Really like this bed although it is not as soft as I really wanted, I am on a strict budget and could not get the softest, most expensive mattress. Still happy with it and prefer it to my old Tempur Pedic Simplicity bed which I gave to my daughter and cheaper than Tempur Pedic.

            Service and delivery comments:

            Really hassle free. Not at all hard to bring inside in the box.

             
            5.0

            Snug as a big in a rug

            By 

            from Bozeman, Montana

            About Me Midrange Shopper

            Verified Buyer

            Pros

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

            Cons

              Best Uses

              • Primary Bed

              Comments about Amerisleep AS4:

              This is the most comfortable mattress I've ever slept on. I love it and look forward to bedtime.

              Service and delivery comments:

              Delivery, condition of product and customer service we're all great.

               
              5.0

              Life Changing!!!

              By 

              from Columbus, OH

              About Me Midrange Shopper

              Verified Buyer

              Pros

              • Comfortable
              • Good Support
              • Holds Shape
              • Soft Feel

              Cons

                Best Uses

                • Primary Bed

                Comments about Amerisleep AS4:

                The bed has completely changed our lives! We're sleeping much longer, deeper, and longer than our last mattress. Also, the husband's snoring stopped immediately! A wonderful, unexpected surprise!

                Service and delivery comments:

                Arrived a few days earlier than we expected.

                (1 of 1 customers found this review helpful)

                 
                5.0

                My future purchases of mattresses will be Amerisleep.

                By 

                from Michigan

                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 have not had lower back pain since the first night I slept on the Amerisleep mattress.

                  Service and delivery comments:

                  The delivery was speedy and no damage to any of the materials or the packaging.
                  The mattress was easy to take out of the packaging and lay on the bed frame.

                  (2 of 2 customers found this review helpful)

                   
                  5.0

                  Best sleep ever!

                  By 

                  from Muskegon Michigan

                  About Me Midrange Shopper

                  Verified Buyer

                  Pros

                  • Comfortable
                  • Good Support
                  • Holds Shape
                  • Look forward to going to bed and staying there
                  • Soft Feel
                  • Sturdy

                  Cons

                    Best Uses

                    • Primary Bed

                    Comments about Amerisleep AS4:

                    Went from sleep number to best bed ever!

                    Service and delivery comments:

                    Arrived on time and well packged

                    (1 of 1 customers found this review helpful)

                     
                    4.0

                    Very good bed

                    By 

                    from Catawba Virginia

                    About Me Midrange Shopper

                    Verified Buyer

                    Pros

                    • Comfortable

                    Cons

                    • Too Hard

                    Best Uses

                    • Primary Bed

                    Comments about Amerisleep AS4:

                    When I first opened it up. It was perfectly soft. I layer on it and went to sleep in less than 5 min, that's unusual for me. I thought I love this bed wish I would have bought this a long time ago. Over the next couple days it firmed up. Over all it has held its shape well, I have had it for almost 3 months. It doesn't have an odor to it, I have alot of allergies have no problem with it. The bed don't get hot, as I have heard from other people talking about other beds. I am still happy with it, in hind sight I would have gotten the softer bed.

                    Service and delivery comments:

                    Bed arrived in very good condition earlier than expected.

                    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.