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
$1699 $1499 with promo
Save $200.00
 

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 629 reviews)

Ratings Distribution

  • 5 Stars

     

    (481)

  • 4 Stars

     

    (115)

  • 3 Stars

     

    (20)

  • 2 Stars

     

    (8)

  • 1 Stars

     

    (5)

97%

of respondents would recommend this to a friend.

Pros

  • Comfortable (567)
  • Good support (546)
  • Holds shape (466)
  • Soft feel (440)
  • Durable (352)

Cons

  • Too hard (65)
  • Too soft (13)
  • Develops cavity (11)
  • Squeaks (4)

Best Uses

  • Primary bed (600)
  • Guest bed (44)
    • Reviewer Profile:
    • Midrange shopper (441), High-end shopper (116), Budget shopper (56)

Reviewed by 629 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
5.0

I forgot what it was like to sleep through the whole night!

By 

from Ohio

Verified Buyer

Pros

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

Cons

    Best Uses

    • Primary Bed

    Comments about Amerisleep AS4:

    I ordered this to replace a sleep number bed that was so uncomfortable. I now sleep through the night and wake without the back pain that was so bad before. I'm a fit person, but I have arthritis in my back and this mattress allows me to be comfortable all night.

     
    5.0

    Awesome Bed!

    By 

    from Westfield, IN

    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 use this product on a nightly basis and it is awesome! Originally, I had a Casper bed and it was horrible yet after buying the amerisleep bed I have been more than impressed. I would love to provide them for guests so they can enjoy what I get to every night!

       
      2.0

      Review

      By 

      from Texas

      About Me Midrange Shopper

      Verified Buyer

      Pros

      • Holds Shape
      • Sturdy

      Cons

      • Too Hard

      Best Uses

        Comments about Amerisleep AS4:

        Just too hard. I'm a side sleeper & sometimes wake up with shoulder pain.

         
        5.0

        I would recommend to anyone having sleep issues

        By 

        from Erie, Colorado

        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 slept this well in years! Had to change pillows with the different softness of the new mattress, but no numb shoulders and arms, no hip pain, no lower back pain, and weirdly, no hotflashes!

          Service and delivery comments:

          Prompt delivery, arrived in great condition, and does not have chemical smell like other memoryfoam type mattresses.

           
          5.0

          Surprising comfort.

          By 

          from Woodland Hills, CA

          About Me Midrange Shopper

          Verified Buyer

          Pros

          • Comfortable
          • Good Support
          • Holds Shape

          Cons

          • Edge support

          Best Uses

          • Primary Bed

          Comments about Amerisleep AS4:

          I was extremely skeptical to purchase a bed online. I thought it would be too firm or too soft for my liking. My worries were wrong. The bed is PERFECT. I weigh around 160 and the bed has excellent support and is the perfect amount of plush. My partner weighs 130 and says she wishes she sunk more into the bed, but the support is great. The edge support for both of us could be better, however we do not roll off- the support is enough to put our shoes on at the end of the bed. I am a rather hot sleeper, and the bed keeps much cooler than a traditional memory foam, however it could be better (I feel like it is because of the sheets I own). Overall this bed is an AMAZING value and highly recommend it. The sleep guarantee has the peace of mind I needed, and would not have bought the mattress without it- so I am very glad it was there. Getting the mattress delivered was also super fun. Watching it expand was exciting. I would buy this bed a million times again.

           
          5.0

          Nicest mattress I've ever had.

          By 

          from Ferndale, 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:

            Great mattress for the money!

            Service and delivery comments:

            Took a long time to get to northern California 2-3 weeks.

            (1 of 1 customers found this review helpful)

             
            5.0

            Best Sleep I have had in years! Worth Every penny!

            By 

            from Frisco, Texs

            About Me Budget Shopper

            Verified Buyer

            Pros

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

            Cons

              Best Uses

              • Primary Bed

              Comments about Amerisleep AS4:

              First new mattress I have had in a long time so I researched to find out which mattress was the best. I am a side and back sleeper so it was most important that my new mattress be comfortable. I thought I had become a permanent insomniac until I started sleeping on my Amerisleep mattress, best purchase I have ever made.

               
              5.0

              Best mattress yet

              By 

              from Tucson, AZ

              About Me High-end Shopper

              Verified Buyer

              Pros

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

              Cons

                Best Uses

                • Primary Bed

                Comments about Amerisleep AS4:

                I was ready to pay anything for a comfortable mattress, one with good support that also feels soft. This is the best mattress I have ever had. After reading the reviews, I was ready to order online, but it was so nice to find the Amerisleep store and be able to try the different mattresses. The sales people were so helpful in understanding my needs. I was also very happy to find that I could use the mattress on my Sleep Number platform and use the control to raise and lower the head and feet.

                Service and delivery comments:

                My order came quickly and was easy to install by myself and husband.

                (1 of 1 customers found this review helpful)

                 
                5.0

                Best bed I've owned

                By 

                from Staunton, VA

                About Me Budget Shopper

                Verified Buyer

                Pros

                • Comfortable
                • Good Support
                • Holds Shape
                • Sturdy

                Cons

                • Too Hard

                Best Uses

                • Primary Bed

                Comments about Amerisleep AS4:

                Great bed overall, while admittedly being firmer than I expected the softest bed Amerisleep had to offer would be, it's still quite comfortable. The AS4 offers great support and you don't get stuck in it. After about 30 days it does break in well and soften up a bit more, I however loving to sleep on a cloud called and inquired about options and they offered me a free topper! It was also great quality, after the topper it was the perfect balance of support and softness.

                 
                5.0

                Great bed

                By 

                from Encinitas, CA

                About Me High-end Shopper

                Verified Buyer

                Pros

                • Comfortable
                • Good Support
                • Holds Shape
                • Soft Feel

                Cons

                  Best Uses

                  • Primary Bed

                  Comments about Amerisleep AS4:

                  Fantastic bed. Even better than a tempurpedic!!

                  Service and delivery comments:

                  Delivery was good, but slightly later than promised

                  Displaying reviews 1-10

                  Back to top

                  Previous | Next »

                  *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.